{"cve":"CVE-2026-108260","nvd":{"published":"2026-10-09T21:17:04.180","modified":"2026-10-16T20:04:29.760","status":"Deferred","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N","score":7.6},"cwes":["CWE-79","CWE-83"],"references":["https://github.com/tinacms/tinacms/commit/5295e077f0d279c35686a0e481a15e33a4877e3b","https://github.com/tinacms/tinacms/pull/7523","https://github.com/tinacms/tinacms/releases/tag/@tinacms/web-components@0.2.1","https://github.com/tinacms/tinacms/security/advisories/GHSA-c42q-qvc3-j6vg","https://github.com/tinacms/tinacms/security/advisories/GHSA-c42q-qvc3-j6vg"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:58:01.639778232+00:00"},"epss":{"cve":"CVE-2026-108260","score":0.00254,"percentile":0.16719,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-c42q-qvc3-j6vg","url":"https://osv.dev/vulnerability/GHSA-c42q-qvc3-j6vg","summary":"@tinacms/web-components: `tina-markdown` writes rich-text link URLs into `href` without scheme validation, allowing stored XSS","modified":"2026-10-09T21:15:04.363433366Z","packages":[{"ecosystem":"npm","name":"@tinacms/web-components","purl":"pkg:npm/%40tinacms/web-components","ranges":["<0.2.1"],"fixed":["0.2.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}