High 7.6Published Oct 9, 2026

CVE-2026-108260@tinacms/web-components: `tina-markdown` writes rich-text link URLs into `href` without scheme validation, allowing stored XSS

Updated under an hour ago (2026-10-19 08:23 UTC)

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It affects tinacms and 1 other product. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.21%, higher than 10% of scored CVEs.

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Exploited in the last 30 days

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: 7.6 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
Weakness (CWE): CWE-79, CWE-83
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.21% (percentile 10)
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Oct 13, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

tinacms tinacms tinacms:tinacms (from the name)	before 3.14.0	CNA record
@tinacms web-components tinacms:web_components (from the name)	before 0.2.1	CNA record

References

https://github.com/tinacms/tinacms/security/advisories/GHSA-c42q-qvc3-j6vgx-refsource-confirm
https://github.com/tinacms/tinacms/pull/7523x-refsource-misc
https://github.com/tinacms/tinacms/commit/5295e077f0d279c35686a0e481a15e33a4877e3bx-refsource-misc
https://github.com/tinacms/tinacms/releases/tag/@tinacms/web-components@0.2.1x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.