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: 2026-10-29 Summary: Mozilla Thunderbird is a standalone mail and newsgroup client. Security Fix(es): * libexpat: denial of service via crafted XML input (CVE-2026-45186) Bug Fix(es) and Enhancement(s): * Thunderbird ESR 153 rebase [rhel-10.2.z] (JIRA:RHEL-175207) 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-2026-90895.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