CVE-2026-42455

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.

CVSS

No CVSS.

References

Link	Resource
https://github.com/linkwarden/linkwarden/security/advisories/GHSA-fjvg-mch3-j3vg
https://github.com/linkwarden/linkwarden/security/advisories/GHSA-fjvg-mch3-j3vg

Configurations

No configuration.

History

12 May 2026, 03:16

Type	Values Removed	Values Added
References	~~() https://github.com/linkwarden/linkwarden/security/advisories/GHSA-fjvg-mch3-j3vg -~~	() https://github.com/linkwarden/linkwarden/security/advisories/GHSA-fjvg-mch3-j3vg -

09 May 2026, 00:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-09 00:16

Updated : 2026-06-17 10:47

NVD link : CVE-2026-42455

Mitre link : CVE-2026-42455

CVE.ORG link : CVE-2026-42455

JSON object : View

Products Affected

No product.

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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