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[Security Advisory] ALSA-2026:6342: thunderbird security update (Important)
by AlmaLinux Errata Notifications 01 Apr '26

01 Apr '26

Hi, You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux. AlmaLinux: 10 Type: Security Severity: Important Release date: 2026-04-01 Summary: Mozilla Thunderbird is a standalone mail and newsgroup client. Security Fix(es): * firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-4701) * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4721) * firefox: thunderbird: Privilege escalation in the Netmonitor component (CVE-2026-4717) * firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-4688) * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4706) * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4695) * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4689) * firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-4698) * firefox: thunderbird: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component (CVE-2026-4716) * firefox: thunderbird: Race condition, use-after-free in the Graphics: WebRender component (CVE-2026-4684) * firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4705) * firefox: thunderbird: Uninitialized memory in the Graphics: Canvas2D component (CVE-2026-4715) * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4685) * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4714) * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-4709) * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4710) * firefox: thunderbird: Information disclosure in the Widget: Cocoa component (CVE-2026-4712) * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4697) * firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4713) * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4690) * firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-4711) * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4686) * firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4708) * firefox: thunderbird: Use-after-free in the CSS Parsing and Computation component (CVE-2026-4691) * firefox: thunderbird: Incorrect boundary conditions in the Layout: Text and Fonts component (CVE-2026-4699) * firefox: thunderbird: Use-after-free in the Layout: Text and Fonts component (CVE-2026-4696) * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component (CVE-2026-4693) * firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4718) * firefox: thunderbird: JIT miscompilation in the JavaScript Engine component (CVE-2026-4702) * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Text component (CVE-2026-4719) * firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component (CVE-2026-4694) * firefox: thunderbird: Sandbox escape in the Responsive Design Mode component (CVE-2026-4692) * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4720) * firefox: thunderbird: Mitigation bypass in the Networking: HTTP component (CVE-2026-4700) * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4707) * firefox: thunderbird: Denial-of-service in the WebRTC: Signaling component (CVE-2026-4704) * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Telemetry component (CVE-2026-4687) * thunderbird: Out of bounds read in IMAP parsing (CVE-2026-4371) * thunderbird: Spoofing issue in Thunderbird (CVE-2026-3889) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Full details, updated packages, references, and other related information: https://errata.almalinux.org/10/ALSA-2026-6342.html This message is automatically generated, please don’t reply. For further questions, please, contact us via the AlmaLinux community chat: https://chat.almalinux.org/. Want to change your notification settings? Sign in and manage mailing lists on https://lists.almalinux.org. Kind regards, AlmaLinux Team

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[Security Advisory] ALSA-2026:6256: python3.12 security update (Important)
by AlmaLinux Errata Notifications 01 Apr '26

01 Apr '26

Hi, You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux. AlmaLinux: 10 Type: Security Severity: Important Release date: 2026-04-01 Summary: Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. Security Fix(es): * python: Python: Command-line option injection in webbrowser.open() via crafted URLs (CVE-2026-4519) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Full details, updated packages, references, and other related information: https://errata.almalinux.org/10/ALSA-2026-6256.html This message is automatically generated, please don’t reply. For further questions, please, contact us via the AlmaLinux community chat: https://chat.almalinux.org/. Want to change your notification settings? Sign in and manage mailing lists on https://lists.almalinux.org. Kind regards, AlmaLinux Team

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[Security Advisory] ALSA-2026:6266: libxslt security update (Moderate)
by AlmaLinux Errata Notifications 01 Apr '26

01 Apr '26

Hi, You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux. AlmaLinux: 9 Type: Security Severity: Moderate Release date: 2026-04-01 Summary: libxslt is a library for transforming XML files into other textual formats (including HTML, plain text, and other XML representations of the underlying data) using the standard XSLT stylesheet transformation mechanism. Security Fix(es): * libxslt: Processing web content may disclose sensitive information (CVE-2023-40403) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Full details, updated packages, references, and other related information: https://errata.almalinux.org/9/ALSA-2026-6266.html This message is automatically generated, please don’t reply. For further questions, please, contact us via the AlmaLinux community chat: https://chat.almalinux.org/. Want to change your notification settings? Sign in and manage mailing lists on https://lists.almalinux.org. Kind regards, AlmaLinux Team

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[Security Advisory] ALSA-2026:6301: squid security update (Important)
by AlmaLinux Errata Notifications 01 Apr '26

01 Apr '26

Hi, You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux. AlmaLinux: 9 Type: Security Severity: Important Release date: 2026-04-01 Summary: Squid is a high-performance proxy caching server for web clients, supporting FTP, and HTTP data objects. Security Fix(es): * squid: Squid: Denial of Service via heap Use-After-Free vulnerability in ICP handling (CVE-2026-33526) * Squid: Squid: Denial of Service via crafted ICP traffic (CVE-2026-32748) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Full details, updated packages, references, and other related information: https://errata.almalinux.org/9/ALSA-2026-6301.html This message is automatically generated, please don’t reply. For further questions, please, contact us via the AlmaLinux community chat: https://chat.almalinux.org/. Want to change your notification settings? Sign in and manage mailing lists on https://lists.almalinux.org. Kind regards, AlmaLinux Team

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[Security Advisory] ALSA-2026:6286: python3.11 security update (Important)
by AlmaLinux Errata Notifications 01 Apr '26

01 Apr '26

Hi, You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux. AlmaLinux: 9 Type: Security Severity: Important Release date: 2026-04-01 Summary: Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. Security Fix(es): * python: Python: Command-line option injection in webbrowser.open() via crafted URLs (CVE-2026-4519) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Full details, updated packages, references, and other related information: https://errata.almalinux.org/9/ALSA-2026-6286.html This message is automatically generated, please don’t reply. For further questions, please, contact us via the AlmaLinux community chat: https://chat.almalinux.org/. Want to change your notification settings? Sign in and manage mailing lists on https://lists.almalinux.org. Kind regards, AlmaLinux Team

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[Security Advisory] ALSA-2026:6285: python3.12 security update (Important)
by AlmaLinux Errata Notifications 01 Apr '26

01 Apr '26

Hi, You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux. AlmaLinux: 9 Type: Security Severity: Important Release date: 2026-04-01 Summary: Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. Security Fix(es): * python: Python: Command-line option injection in webbrowser.open() via crafted URLs (CVE-2026-4519) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Full details, updated packages, references, and other related information: https://errata.almalinux.org/9/ALSA-2026-6285.html This message is automatically generated, please don’t reply. For further questions, please, contact us via the AlmaLinux community chat: https://chat.almalinux.org/. Want to change your notification settings? Sign in and manage mailing lists on https://lists.almalinux.org. Kind regards, AlmaLinux Team

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[Security Advisory] ALSA-2026:6004: freerdp security update (Important)
by AlmaLinux Errata Notifications 01 Apr '26

01 Apr '26

Hi, You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux. AlmaLinux: 9 Type: Security Severity: Important Release date: 2026-03-31 Summary: FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. The xfreerdp client can connect to RDP servers such as Microsoft Windows machines, xrdp, and VirtualBox. Security Fix(es): * freerdp: FreeRDP: Arbitrary code execution via heap out-of-bounds write in RLE planar decode path (CVE-2026-26965) * freerdp: FreeRDP: Arbitrary code execution via heap buffer overflow in GDI surface pipeline (CVE-2026-26955) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Full details, updated packages, references, and other related information: https://errata.almalinux.org/9/ALSA-2026-6004.html This message is automatically generated, please don’t reply. For further questions, please, contact us via the AlmaLinux community chat: https://chat.almalinux.org/. Want to change your notification settings? Sign in and manage mailing lists on https://lists.almalinux.org. Kind regards, AlmaLinux Team

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[Security Advisory] ALSA-2026:6281: python3.11 security update (Important)
by AlmaLinux Errata Notifications 01 Apr '26

01 Apr '26

Hi, You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux. AlmaLinux: 8 Type: Security Severity: Important Release date: 2026-04-01 Summary: Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. Security Fix(es): * python: Python: Command-line option injection in webbrowser.open() via crafted URLs (CVE-2026-4519) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Full details, updated packages, references, and other related information: https://errata.almalinux.org/8/ALSA-2026-6281.html This message is automatically generated, please don’t reply. For further questions, please, contact us via the AlmaLinux community chat: https://chat.almalinux.org/. Want to change your notification settings? Sign in and manage mailing lists on https://lists.almalinux.org. Kind regards, AlmaLinux Team

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[Security Advisory] ALSA-2026:6283: python3.12 security update (Important)
by AlmaLinux Errata Notifications 01 Apr '26

01 Apr '26

Hi, You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux. AlmaLinux: 8 Type: Security Severity: Important Release date: 2026-04-01 Summary: Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. Security Fix(es): * python: Python: Command-line option injection in webbrowser.open() via crafted URLs (CVE-2026-4519) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Full details, updated packages, references, and other related information: https://errata.almalinux.org/8/ALSA-2026-6283.html This message is automatically generated, please don’t reply. For further questions, please, contact us via the AlmaLinux community chat: https://chat.almalinux.org/. Want to change your notification settings? Sign in and manage mailing lists on https://lists.almalinux.org. Kind regards, AlmaLinux Team

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[Security Advisory] ALSA-2026:5931: firefox security update (Important)
by AlmaLinux Errata Notifications 30 Mar '26

30 Mar '26

Hi, You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux. AlmaLinux: 10 Type: Security Severity: Important Release date: 2026-03-30 Summary: Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. Security Fix(es): * firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-4701) * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4721) * firefox: thunderbird: Privilege escalation in the Netmonitor component (CVE-2026-4717) * firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-4688) * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4706) * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4695) * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4689) * firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-4698) * firefox: thunderbird: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component (CVE-2026-4716) * firefox: thunderbird: Race condition, use-after-free in the Graphics: WebRender component (CVE-2026-4684) * firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4705) * firefox: thunderbird: Uninitialized memory in the Graphics: Canvas2D component (CVE-2026-4715) * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4685) * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4714) * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-4709) * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4710) * firefox: thunderbird: Information disclosure in the Widget: Cocoa component (CVE-2026-4712) * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4697) * firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4713) * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4690) * firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-4711) * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4686) * firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4708) * firefox: thunderbird: Use-after-free in the CSS Parsing and Computation component (CVE-2026-4691) * firefox: thunderbird: Incorrect boundary conditions in the Layout: Text and Fonts component (CVE-2026-4699) * firefox: thunderbird: Use-after-free in the Layout: Text and Fonts component (CVE-2026-4696) * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component (CVE-2026-4693) * firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4718) * firefox: thunderbird: JIT miscompilation in the JavaScript Engine component (CVE-2026-4702) * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Text component (CVE-2026-4719) * firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component (CVE-2026-4694) * firefox: thunderbird: Sandbox escape in the Responsive Design Mode component (CVE-2026-4692) * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4720) * firefox: thunderbird: Mitigation bypass in the Networking: HTTP component (CVE-2026-4700) * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4707) * firefox: thunderbird: Denial-of-service in the WebRTC: Signaling component (CVE-2026-4704) * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Telemetry component (CVE-2026-4687) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Full details, updated packages, references, and other related information: https://errata.almalinux.org/10/ALSA-2026-5931.html This message is automatically generated, please don’t reply. For further questions, please, contact us via the AlmaLinux community chat: https://chat.almalinux.org/. Want to change your notification settings? Sign in and manage mailing lists on https://lists.almalinux.org. Kind regards, AlmaLinux Team

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