{"id":"CVE-2026-83616","aliases":["GHSA-c7q8-3ch8-vqpv"],"url":"https://o3.security/vulnerability/CVE-2026-83616","summary":"xmldom: Processing Instruction Target Injection Bypasses requireWellFormed","details":"xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. Prior to @xmldom/xmldom versions 0.8.15 and 0.9.12, and in xmldom version 0.6.0 and earlier, Document.createProcessingInstruction(target, data) in lib/dom.js accepts an unvalidated target, while the requireWellFormed: true serializer checks only for a colon and the reserved case-insensitive xml name on 0.9.x and performs no target check on 0.8.x. Because serialization emits <?target data?>, a target containing >, ?, whitespace, or another invalid XML-name character can break the processing-instruction boundary and inject XML structure. This issue is fixed in @xmldom/xmldom versions 0.8.15 and 0.9.12; no fixed version is available for xmldom.","published":"2026-09-01T14:45:44.504Z","modified":"2026-09-10T03:30:43.159495870Z","cvss":null,"epss":{"score":0.00348,"percentile":0.27922,"asOf":"2026-09-10"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"@xmldom/xmldom","fixedVersion":"0.8.15"},{"ecosystem":"npm","name":"@xmldom/xmldom","fixedVersion":"0.9.12"},{"ecosystem":"npm","name":"xmldom","fixedVersion":null}],"fix":{"url":"https://github.com/xmldom/xmldom/commit/1cde3e31a07c41c87cfd368d6946aa477f16b4f9","label":"xmldom/xmldom@1cde3e3"},"references":[{"type":"WEB","url":"https://github.com/xmldom/xmldom/releases/tag/0.8.15"},{"type":"WEB","url":"https://github.com/xmldom/xmldom/releases/tag/0.9.12"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/83xxx/CVE-2026-83616.json"},{"type":"ADVISORY","url":"https://github.com/xmldom/xmldom/security/advisories/GHSA-c7q8-3ch8-vqpv"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-83616"},{"type":"FIX","url":"https://github.com/xmldom/xmldom/commit/1cde3e31a07c41c87cfd368d6946aa477f16b4f9"},{"type":"FIX","url":"https://github.com/xmldom/xmldom/commit/3b694872bcb5c7e3cbadba961a4be2488750ce5b"},{"type":"FIX","url":"https://github.com/xmldom/xmldom/pull/1071"},{"type":"FIX","url":"https://github.com/xmldom/xmldom/pull/1072"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-10T03:30:43.159495870Z"}}