{"id":"CVE-2026-86138","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-86138","summary":null,"details":"In libxml2 before 2.15.4, xmlDictAddQString in dict.c has an integer overflow and resultant heap-based buffer overflow.","published":"2026-09-05T04:21:53.127Z","modified":"2026-09-10T08:16:08.518514Z","cvss":{"score":6.9,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/GNOME/libxml2/commit/a4cba4b5b5a8c42e155ed42d2d2a44955465a2e4","label":"GNOME/libxml2@a4cba4b"},"references":[{"type":"WEB","url":"https://github.com/GNOME/libxml2/compare/v2.15.3...v2.15.4"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86138.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86138"},{"type":"FIX","url":"https://github.com/GNOME/libxml2/commit/a4cba4b5b5a8c42e155ed42d2d2a44955465a2e4"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-10T08:16:08.518514Z"}}