Advisories » MGASA-2026-0014

Updated thunderbird packages fix security vulnerabilities

Publication date: 20 Jan 2026
Modification date: 20 Jan 2026
Type: security
Affected Mageia releases : 9
CVE: CVE-2026-0877 , CVE-2026-0878 , CVE-2026-0879 , CVE-2026-0880 , CVE-2026-0882 , CVE-2025-14327 , CVE-2026-0883 , CVE-2026-0884 , CVE-2026-0885 , CVE-2026-0886 , CVE-2026-0887 , CVE-2026-0890 , CVE-2026-0891

Description

Mitigation bypass in the DOM: Security component. (CVE-2026-0877)
Sandbox escape due to incorrect boundary conditions in the Graphics:
CanvasWebGL component. (CVE-2026-0878)
Sandbox escape due to incorrect boundary conditions in the Graphics
component. (CVE-2026-0879)
Sandbox escape due to integer overflow in the Graphics component.
(CVE-2026-0880)
Use-after-free in the IPC component. (CVE-2026-0882)
Spoofing issue in the Downloads Panel component. (CVE-2025-14327)
Information disclosure in the Networking component. (CVE-2026-0883)
Use-after-free in the JavaScript Engine component. (CVE-2026-0884)
Use-after-free in the JavaScript: GC component. (CVE-2026-0885)
Incorrect boundary conditions in the Graphics component. (CVE-2026-0886)
Clickjacking issue, information disclosure in the PDF Viewer component.
(CVE-2026-0887)
Spoofing issue in the DOM: Copy & Paste and Drag & Drop component.
(CVE-2026-0890)
Memory safety bugs fixed in Firefox ESR 140.7, Thunderbird ESR 140.7,
Firefox 147 and Thunderbird 147. (CVE-2026-0891)
                

References

• https://bugs.mageia.org/show_bug.cgi?id=34993
• https://www.thunderbird.net/en-US/thunderbird/140.7.0esr/releasenotes/
• https://www.mozilla.org/en-US/security/advisories/mfsa2026-05/
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-0877
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-0878
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-0879
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-0880
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-0882
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-14327
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-0883
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-0884
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-0885
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-0886
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-0887
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-0890
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-0891

SRPMS

9/core

• thunderbird-140.7.0-1.mga9
• thunderbird-l10n-140.7.0-1.mga9