{"cve":"CVE-2026-12307","nvd":{"published":"2026-06-16T13:16:30.933","modified":"2026-10-26T13:10:00.140","status":"Modified","description":"Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":5.3},"cwes":["CWE-119"],"references":["https://bugzilla.mozilla.org/show_bug.cgi?id=2038133","https://www.mozilla.org/security/advisories/mfsa2026-57/","https://www.mozilla.org/security/advisories/mfsa2026-58/","https://www.mozilla.org/security/advisories/mfsa2026-60/","https://www.mozilla.org/security/advisories/mfsa2026-61/"],"products":["mozilla:firefox","mozilla:thunderbird"],"source":"nvd","synced_at":"2026-10-26T13:39:24.642594360+00:00"},"epss":{"cve":"CVE-2026-12307","score":0.00261,"percentile":0.17684,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}