Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-12291

Use-after-free in the Networking: HTTP component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 30.2%
CVSS Severity
CVSS v3 Score 8.8
References
Products affected by CVE-2026-12291


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