CVE Catalog

CVE-2026-117983

Low risk· EPSS 8%
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.18%

8th percentile - higher than 8% of all known CVEs

Summary

A use-after-free vulnerability exists in the Graphics component of Firefox and Thunderbird. It was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.

Risk Assessment

A use-after-free flaw can lead to memory corruption, application crashes, or potential code execution via malicious content. Workstations running vulnerable versions are exposed.

Recommendation

Update Firefox to version 159 or ESR 153.6 and Thunderbird to version 159 or 153.6. Verify versions across all workstations and terminal servers.

Other vulnerabilities in Firefox / Thunderbird

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Original NVD description (English source)

Use-after-free in the Graphics component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS