XSS in @Tinacms Web-Components
CVE-2026-108260
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published .
CVSS v3 metric
CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- @Tinacms Web-Components — versions < 0.2.1
- Tinacms — versions < 3.14.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-108260?
- CVE-2026-108260 is a high-severity vulnerability in @Tinacms Web-Components, classified under Cross-site Scripting. CVSS score: 7.6/10. Published 2026-10-09.
- How severe is CVE-2026-108260?
- High severity. CVSS v3 base score is 7.6 out of 10.