[ALSA-2026:12285] Important: thunderbird security update
Type:
security
Severity:
important
Release date:
2026-05-03
Description:
Mozilla Thunderbird is a standalone mail and newsgroup client. Security Fix(es): * firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6772) * firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-6754) * firefox: thunderbird: Spoofing issue in the DOM: Core & HTML component (CVE-2026-6762) * firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6752) * firefox: thunderbird: Other issue in the Storage: IndexedDB component (CVE-2026-6770) * firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-6757) * firefox: thunderbird: Other issue in the Libraries component in NSS (CVE-2026-6767) * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6786) * firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6753) * firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-6759) * firefox: thunderbird: Use-after-free in the WebRTC component (CVE-2026-6747) * firefox: thunderbird: Information disclosure due to uninitialized memory in the Graphics: Canvas2D component (CVE-2026-6749) * firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6766) * firefox: thunderbird: Privilege escalation in the Networking component (CVE-2026-6761) * firefox: thunderbird: Mitigation bypass in the File Handling component (CVE-2026-6763) * firefox: thunderbird: Privilege escalation in the Graphics: WebRender component (CVE-2026-6750) * firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6748) * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6785) * firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-6771) * firefox: thunderbird: Incorrect boundary conditions in the DOM: Device Interfaces component (CVE-2026-6764) * firefox: thunderbird: Information disclosure in the Form Autofill component (CVE-2026-6765) * firefox: thunderbird: Privilege escalation in the Debugger component (CVE-2026-6769) * firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6751) * firefox: thunderbird: Incorrect boundary conditions in the WebRTC: Networking component (CVE-2026-6776) * firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-6746) 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.
References:
Updated packages listed below:
Architecture Package Checksum
aarch64 thunderbird-140.10.0-1.el10_1.alma.1.aarch64.rpm c0452b2d7af2244545159dd6a22dd7951b9f7ccd0e03fc6fe4da26a6ddf2ecfd
ppc64le thunderbird-140.10.0-1.el10_1.alma.1.ppc64le.rpm e7c6ba0bdf100f7c739f05ae53b958ebd2dd12069affc267f4863abcc0d7a254
s390x thunderbird-140.10.0-1.el10_1.alma.1.s390x.rpm 0ec2bae6089e585339d06b07cb6f746072eb6e1427f25f2cff8af1d0d960465e
x86_64 thunderbird-140.10.0-1.el10_1.alma.1.x86_64.rpm 4e44c8dbe95edd90f78c6686a96ac44eea86742bc23bbcf5cc8ad2a1124ca57b
x86_64_v2 thunderbird-140.10.0-1.el10_1.alma.1.x86_64_v2.rpm 4352f5a811132dbb2b40da97755c56bb307f2bb53b088b5bfa9fa676f114f7ff
Notes:
This page is generated automatically from Red Hat security data and has not been checked for errors. For clarification or corrections please contact the AlmaLinux Packaging Team.