CVE-2026-109760

—Unscored

Published 13 Oct 2026 · NVD status: Deferred · AI triage by gemini-3.8-flash

—Unscored

Attack vector: —
Complexity: —
Privileges needed: —
User interaction: —
Impact: —
Weakness: —

Impact

Attackers can bypass existing security mitigations via HTTP networking traffic. Exploitation typically requires a user to visit a malicious website or load attacker-controlled network content.

Root cause

A mitigation bypass defect exists within the HTTP networking component.

Affected systems

Firefox versions prior to 158, Firefox ESR prior to 153.5, and Thunderbird prior to 158 and 153.5.

Fix & remediation

Upgrade to Firefox 158, Firefox ESR 153.5, Thunderbird 158, or Thunderbird 153.5. No interim configuration mitigation is documented.

shell

$ sudo apt-get update && sudo apt-get install --only-upgrade firefox thunderbird

AI-suggested. Run it in staging first and check it against the vendor advisory. Why?

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NVD description

Mitigation bypass in the Networking: HTTP component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.

References

Source: nvd.nist.gov/vuln/detail/CVE-2026-109760