CVE-2026-4700

CRITICAL

firefox: thunderbird: Mitigation bypass in the Networking: HTTP component

Details

CVSS v3: 9.8
NVD published: 2026-03-24 13:16:06
EPSS: <0.1% probability · 5.9th percentile — 2026-04-12
Affected versions: cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:* cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
Summary: Mitigation bypass in the Networking: HTTP component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.
Remediation: Not available in our cache.
Exploit info: Not available in our cache.

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Information is aggregated from multiple authoritative sources for convenience; verify with NVD and vendors before operational decisions.