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High ALAS2-2026-3167 14 CVEs

Important: thunderbird security update (Amazon Linux 2)

Published Feb 16, 2026 · Updated Feb 18, 2026

Ecosystem: Amazon Linux

Summary

Package updates are available for Amazon Linux 2 that fix the following vulnerabilities: CVE-2026-0891: Memory safety bugs present in Firefox ESR 140.6, Thunderbird ESR 140.6, Firefox 146 and Thunderbird 146. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 147 and Firefox ESR < 140.7. CVE-2026-0890: Spoofing issue in the DOM: Copy & Paste and Drag & Drop component. This vulnerability affects Firefox < 147 and Firefox ESR < 140.7. CVE-2026-0887: Clickjacking issue, information disclosure in the PDF Viewer component. This vulnerability affects Firefox < 147 and Firefox ESR < 140.7. CVE-2026-0886: Incorrect boundary conditions in the Graphics component. This vulnerability affects Firefox < 147, Firefox ESR < 115.32, and Firefox ESR < 140.7. CVE-2026-0885: Use-after-free in the JavaScript: GC component. This vulnerability affects Firefox < 147 and Firefox ESR < 140.7. CVE-2026-0884: Use-after-free in the JavaScript Engine component. This vulnerability affects Firefox < 147 and Firefox ESR < 140.7. CVE-2026-0883: Information disclosure in the Networking component. This vulnerability affects Firefox < 147 and Firefox ESR < 140.7. CVE-2026-0882: Use-after-free in the IPC component. This vulnerability affects Firefox < 147, Firefox ESR < 115.32, and Firefox ESR < 140.7. CVE-2026-0880: Sandbox escape due to integer overflow in the Graphics component. This vulnerability affects Firefox < 147, Firefox ESR < 115.32, and Firefox ESR < 140.7. CVE-2026-0879: Sandbox escape due to incorrect boundary conditions in the Graphics component. This vulnerability affects Firefox < 147, Firefox ESR < 115.32, and Firefox ESR < 140.7. CVE-2026-0878: Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability affects Firefox < 147 and Firefox ESR < 140.7. CVE-2026-0877: Mitigation bypass in the DOM: Security component. This vulnerability affects Firefox < 147, Firefox ESR < 115.32, and Firefox ESR < 140.7. CVE-2026-0818: CSS-based exfiltration of the content from partially encrypted emails when allowing remote content. This vulnerability affects Thunderbird < 147.0.1 and Thunderbird < 140.7.1. CVE-2025-14327: Spoofing issue in the Downloads Panel component. This vulnerability affects Firefox < 146.

Fixed packages 1

ReleasePackageFixed in
Amazon Linux · 2 thunderbird 0:140.7.1-1.amzn2.0.1

Vulnerabilities 14

References

  • web
    https://alas.aws.amazon.com/cve/html/CVE-2025-14327.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-0818.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-0877.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-0878.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-0879.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-0880.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-0882.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-0883.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-0884.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-0885.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-0886.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-0887.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-0890.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-0891.html