MEDIUM
CVE-2026-12306
CVSS
5.3
Description
Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.
Weakness (CWE)
CWE-119
Memory Buffer Bounds Error
EPSS Score
0.26%
Probability of exploitation in next 30 days
18.2th percentile
References
https://bugzilla.mozilla.org/show_bug.cgi?id=2037323
Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-57/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-58/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-60/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-61/
Vendor Advisory
Base CVE data derived from NVD (public domain). Enrichment by
dbcve.org
(CC-BY-4.0). Fetched via API.