CVE Catalog

CVE-2026-100759

HighCVSS 8.1
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.31%

22th percentile - higher than 22% of all known CVEs

Summary

Uninitialized memory usage exists in the Storage: Quota Manager component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.

Risk Assessment

Uninitialized memory usage can lead to data leakage or application crashes and, in some cases, code execution. Organizations on unpatched versions are exposed to confidentiality and stability risks.

Recommendation

Update Firefox and Thunderbird to the fixed versions (Firefox 157, Firefox ESR 153.4/140.17/115.42, Thunderbird 157/153.4/140.17). Verify versions across the organization and enforce the update.

Related vulnerabilities

Original NVD description (English source)

Uninitialized memory in the Storage: Quota Manager component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.

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