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Attackers can supply a predicate that accepts specific attribute and tag combinations to bypass URI-safe validation, allowing unsafe protocols like javascript: to survive sanitization and execute as DOM-based XSS when the link is activated.","state":0,"publishedAt":"2026-07-23T13:16:23.406+00:00","modifiedAt":"2026-07-23T15:46:09.055+00:00","affected":[{"ecosystem":"Vendor product","name":"DOMPurify","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"cure53\",\n                    \"product\": \"DOMPurify\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:npm/dompurify\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"3.3.2\"\n                        },\n                        {\n                            \"version\": \"3.3.2\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":5.1,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1,"severity":"MEDIUM"}],"references":["https://github.com/cure53/DOMPurify/security/advisories/GHSA-cjmm-f4jc-qw8r","https://www.vulncheck.com/advisories/dompurify-before-uri-validation-bypass-via-add-attr"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-65912","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-65912","identifiers":["CVE-2026-65912"]},"retained":false,"historicalAffected":[]},{"revision":"f349fe6c84e149a197e683676d47ac11","observedAt":"2026-10-25T15:18:51.467+00:00","statement":{"source":"nvd","id":"CVE-2026-65912","aliases":[],"title":"DOMPurify before 3.3.2 contains a URI validation bypass vulnerability when ADD_ATTR is provided as a predicate function via EXTRA_ELEMENT_HANDLING.attributeCheck. Attackers can supply a predicate that accepts specific attribute and tag comb…","description":"DOMPurify before 3.3.2 contains a URI validation bypass vulnerability when ADD_ATTR is provided as a predicate function via EXTRA_ELEMENT_HANDLING.attributeCheck. Attackers can supply a predicate that accepts specific attribute and tag combinations to bypass URI-safe validation, allowing unsafe protocols like javascript: to survive sanitization and execute as DOM-based XSS when the link is activated.","state":0,"publishedAt":"2026-07-23T14:18:06.417+00:00","modifiedAt":"2026-10-24T13:10:00.147+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · disclosure@vulncheck.com · Secondary","vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":5.1,"severity":"MEDIUM"},{"system":"CVSS 3.1 · disclosure@vulncheck.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1,"severity":"MEDIUM"}],"references":["https://github.com/cure53/DOMPurify/security/advisories/GHSA-cjmm-f4jc-qw8r","https://www.vulncheck.com/advisories/dompurify-before-uri-validation-bypass-via-add-attr"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-65912","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-79"],"productCriteria":["cpe:2.3:a:cure53:dompurify:*:*:*:*:*:*:*:*"],"sourceDates":{"published":"2026-07-23T14:18:06.417","lastModified":"2026-10-24T13:10:00.147"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-65912","identifiers":["CVE-2026-65912"]},"retained":false,"historicalAffected":[]},{"revision":"9571010f70d34543bee26caf24fdfba0","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-cjmm-f4jc-qw8r","aliases":["CVE-2026-65912"],"title":"DOMPurify ADD_ATTR predicate skips URI validation","description":"## Summary\nDOMPurify allows `ADD_ATTR` to be provided as a predicate function via `EXTRA_ELEMENT_HANDLING.attributeCheck`. When the predicate returns `true`, `_isValidAttribute` short-circuits the attribute check before URI-safe validation runs. An attacker who supplies a predicate that accepts specific attribute/tag combinations can then sanitize input such as `<a href=\"javascript:alert(document.domain)\">` and have the `javascript:` URL survive, because URI validation is skipped for that attribute while other checks still pass. The provided PoC accepts `href` for anchors and then triggers a click inside an iframe, showing that the sanitized payload executes despite the protocol bypass.\n\n## Impact\nPredicate-based allowlisting bypasses DOMPurify's URI validation, allowing unsafe protocols such as `javascript:` to reach the DOM and execute whenever the link is activated, resulting in DOM-based XSS.\n\n## Credits\nIdentified by Cantina’s Apex (https://www.cantina.security).","state":0,"publishedAt":"2026-04-03T03:46:07+00:00","modifiedAt":"2026-09-10T03:50:43.8915274+00:00","affected":[{"ecosystem":"npm","name":"dompurify","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"3.3.2"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/cure53/DOMPurify/security/advisories/GHSA-cjmm-f4jc-qw8r","https://github.com/cure53/DOMPurify","https://github.com/cure53/DOMPurify/releases/tag/3.3.2"],"sourceUrl":"https://github.com/advisories/GHSA-cjmm-f4jc-qw8r","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-cjmm-f4jc-qw8r","identifiers":["GHSA-cjmm-f4jc-qw8r","CVE-2026-65912"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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