{"cve":"CVE-2026-8391","nvd":{"published":"2026-05-12T14:17:12.173","modified":"2026-10-25T23:10:00.167","status":"Modified","description":"Other issue in the JavaScript Engine component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11.","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-20","CWE-79","CWE-119","CWE-475"],"references":["https://bugzilla.mozilla.org/show_bug.cgi?id=2038575","https://www.mozilla.org/security/advisories/mfsa2026-45/","https://www.mozilla.org/security/advisories/mfsa2026-47/","https://www.mozilla.org/security/advisories/mfsa2026-48/","https://www.mozilla.org/security/advisories/mfsa2026-51/"],"products":["mozilla:firefox"],"source":"nvd","synced_at":"2026-10-25T23:44:33.281319194+00:00"},"epss":{"cve":"CVE-2026-8391","score":0.00298,"percentile":0.22278,"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."]}