XSS in Amauric Tarteaucitron.js
CVE-2026-111713
tarteaucitron.js before 1.37.0 contains a cross-site scripting vulnerability because getElemAttr resolves 'data-' prefixed attributes while the https-only guard validates the unprefixed attribute. Attackers who can place markup, such as CMS authors, can add data-url with a javascript: URL beside a benign url to execute script in the site's origin via iframe src.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/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
Weakness classification (CWE)
References
- github.com/AmauriC/tarteaucitron.js/commit/068653bd47f5d4a493251ca8e15bd2b0be9b… (patch)
- github.com/AmauriC/tarteaucitron.js/releases/tag/v1.37.0 (release-notes)
- github.com/AmauriC/tarteaucitron.js/blob/v1.36.0/tarteaucitron.js (technical-description)
- github.com/AmauriC/tarteaucitron.js/compare/v1.36.0...v1.37.0 (technical-description)
- www.vulncheck.com/advisories/tarteaucitron-js-before-1.37.0-xss-via-getelemattr… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111713?
- CVE-2026-111713 is a medium-severity vulnerability in Amauric Tarteaucitron.js, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-10-16.
- How severe is CVE-2026-111713?
- Medium severity. CVSS v3 base score is 5.4 out of 10.