{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-108260","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-10-09T17:33:15.409Z","datePublished":"2026-10-09T20:40:37.228Z","dateUpdated":"2026-10-13T15:17:14.297Z"},"containers":{"cna":{"title":"@tinacms/web-components: `tina-markdown` writes rich-text link URLs into `href` without scheme validation, allowing stored XSS","problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-83","lang":"en","description":"CWE-83: Improper Neutralization of Script in Attributes in a Web Page","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.6,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/tinacms/tinacms/security/advisories/GHSA-c42q-qvc3-j6vg","tags":["x_refsource_CONFIRM"],"url":"https://github.com/tinacms/tinacms/security/advisories/GHSA-c42q-qvc3-j6vg"},{"name":"https://github.com/tinacms/tinacms/pull/7523","tags":["x_refsource_MISC"],"url":"https://github.com/tinacms/tinacms/pull/7523"},{"name":"https://github.com/tinacms/tinacms/commit/5295e077f0d279c35686a0e481a15e33a4877e3b","tags":["x_refsource_MISC"],"url":"https://github.com/tinacms/tinacms/commit/5295e077f0d279c35686a0e481a15e33a4877e3b"},{"name":"https://github.com/tinacms/tinacms/releases/tag/@tinacms/web-components@0.2.1","tags":["x_refsource_MISC"],"url":"https://github.com/tinacms/tinacms/releases/tag/@tinacms/web-components@0.2.1"}],"affected":[{"vendor":"tinacms","product":"tinacms","versions":[{"version":"< 3.14.0","status":"affected"}]},{"vendor":"@tinacms","product":"web-components","versions":[{"version":"< 0.2.1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-10-09T20:40:37.228Z"},"descriptions":[{"lang":"en","value":"Tina is a headless content management system. Prior to 0.2.1, the tina-markdown element in packages/@tinacms/web-components/src/tina-markdown.js assigns a rich-text node.url value directly to an anchor href without validating the URL scheme. A content author can store a link using a script-capable scheme, and a visitor who clicks the rendered link executes attacker-controlled script in the site's origin. The script can access same-origin application data and, when the visitor is an editor or administrator, may expose credentials stored by the TinaCMS admin on that origin. This issue is fixed in version 0.2.1."}],"source":{"advisory":"GHSA-c42q-qvc3-j6vg","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/tinacms/tinacms/security/advisories/GHSA-c42q-qvc3-j6vg","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-13T15:17:02.736533Z","id":"CVE-2026-108260","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-10-13T15:17:14.297Z"}}]}}