Vulnerability Description
Linkwarden is a self-hosted, open-source collaborative bookmark manager to collect, organize and archive webpages. In versions 2.14.0 and prior, the archive upload endpoint (POST /api/v1/archives/[linkId]?format=4) accepts HTML files (text/html) without sanitizing JavaScript content. When the archive is later accessed via GET /api/v1/archives/[linkId]?format=4, the HTML is served with Content-Type: text/html from the Linkwarden origin, without any Content-Security-Policy header. This allows arbitrary JavaScript execution in the context of the authenticated Linkwarden sessio. At time of publication, there are no publicly available patches.
Related Weaknesses (CWE)
References
- https://github.com/linkwarden/linkwarden/security/advisories/GHSA-fjvg-mch3-j3vg
- https://github.com/linkwarden/linkwarden/security/advisories/GHSA-fjvg-mch3-j3vg
FAQ
What is CVE-2026-42455?
CVE-2026-42455 is a documented vulnerability. Linkwarden is a self-hosted, open-source collaborative bookmark manager to collect, organize and archive webpages. In versions 2.14.0 and prior, the archive upload endpoint (POST /api/v1/archives/[lin...
How severe is CVE-2026-42455?
CVSS scoring is not yet available for CVE-2026-42455. Check NVD for updates.
Is there a patch for CVE-2026-42455?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.