CVE-2026-2765 - Vulnerability Analysis

Overview

Firefox < 148 and Firefox ESR < 140.8 contain a use-after-free vulnerability in the JavaScript Engine component, letting attackers cause memory corruption or remote code execution, exploit requires crafted web content.

Severity & Score

Impact

Attackers can cause memory corruption or execute arbitrary code remotely via crafted web content.

Mitigation

Update to Firefox 148, Firefox ESR 140.8 or later.

References

• https://www.mozilla.org/security/advisories/mfsa2026-17/
• https://bugzilla.mozilla.org/show_bug.cgi?id=2013562
• https://www.mozilla.org/security/advisories/mfsa2026-13/
• https://www.mozilla.org/security/advisories/mfsa2026-15/
• https://www.mozilla.org/security/advisories/mfsa2026-16/

Related Resources

• Vulnerability Intelligence Dashboard
• Credential Scanner