{"id":"CVE-2026-8630","summary":"justhtml before 1.12.0 Mutation XSS via Raw Text Elements","details":"justhtml before 1.12.0 (versions \u003c= 1.11.0) contains a mutation cross-site scripting (mXSS) vulnerability in the serialization of raw-text elements such as \u003cstyle\u003e and \u003cscript\u003e. When a DOM tree is processed by sanitize_dom() using a custom policy that keeps these elements, text nodes inside them are serialized literally without escaping, allowing attacker-controlled text containing the matching closing tag sequence to break out of the raw-text context and inject arbitrary HTML into the serialized output. The default sanitization policy is not affected because it drops the contents of style and script.","aliases":["GHSA-qvc2-mg72-jjhx"],"modified":"2026-08-28T11:30:52.593422391Z","published":"2026-08-23T13:34:14.556Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/8xxx/CVE-2026-8630.json","cna_assigner":"VulnCheck","cwe_ids":["CWE-79"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/8xxx/CVE-2026-8630.json"},{"type":"ADVISORY","url":"https://github.com/EmilStenstrom/justhtml/security/advisories/GHSA-qvc2-mg72-jjhx"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-8630"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/justhtml-before-mutation-xss-via-raw-text-elements"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/emilstenstrom/justhtml","events":[{"introduced":"0"},{"fixed":"c5185651a443fb806343e6e5b081b49bab588d21"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"1.12.0"}],"source":["AFFECTED_FIELD","DESCRIPTION"]}}],"versions":["v1.11.0","v1.10.0","v1.9.1","v1.9.0","v1.8.0","v1.7.0","v1.6.0","v1.5.0","v1.4.0","v1.3.0","v1.2.0","v1.1.0","v1.0.0","v0.40.0","v0.39.0","v0.38.0","v0.37.0","v0.36.0","v0.35.0","v0.34.0","v0.33.0","v0.32.0","v0.31.0","v0.30.0","v0.29.0","v0.28.0","v0.27.0","v0.26.0","v0.25.0","v0.24.0","v0.23.0","v0.22.0","v0.21.0","v0.20.0","v0.19.0","v0.18.0","v0.17.0","v0.16.0","v0.15.0","v0.14.0","v0.13.1","v0.13.0","v0.12.0","v0.11.0","v0.10.0","v0.9.0","v0.8.0","v0.7.0","v0.6.0","v0.5.2","v0.5.1","v0.5.0","v0.4.0","v0.3.0","v0.2.0","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-8630.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"}]}