CVE-2026-2791 - Vulnerability Analysis

Overview

Firefox < 148 and Firefox ESR < 140.8 contain a mitigation bypass caused by flaws in the Networking: Cache component, letting attackers bypass security mitigations, exploit requires no special conditions.

Severity & Score

Impact

Attackers can bypass security mitigations, potentially leading to further exploitation or system compromise.

Mitigation

Update to Firefox 148 and Firefox ESR 140.8 or later.

References

• https://www.mozilla.org/security/advisories/mfsa2026-17/
• https://bugzilla.mozilla.org/show_bug.cgi?id=2015220
• 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