CVE-2026-2779 - Vulnerability Analysis

Overview

Firefox < 148 and Firefox ESR < 140.8 contain a buffer overflow caused by incorrect boundary conditions in the Networking: JAR component, letting attackers potentially cause memory corruption, exploit requires crafted input.

Severity & Score

Impact

Attackers can cause memory corruption, potentially leading to remote code execution or application crash.

Mitigation

Update to Firefox 148 or later and Firefox ESR 140.8 or later.

References

• https://www.mozilla.org/security/advisories/mfsa2026-16/
• https://www.mozilla.org/security/advisories/mfsa2026-17/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1164141
• https://www.mozilla.org/security/advisories/mfsa2026-13/
• https://www.mozilla.org/security/advisories/mfsa2026-15/

Related Resources

• Vulnerability Intelligence Dashboard
• Credential Scanner