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CVE-2026-42455— LinkWarden: Stored XSS via Client-Side Archive Upload (Unsanitized HTML served from same origin)

EPSS 0.03% · P7
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I. Basic Information for CVE-2026-42455

Vulnerability Information
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Vulnerability Title
LinkWarden: Stored XSS via Client-Side Archive Upload (Unsanitized HTML served from same origin)
Source: NVD (National Vulnerability Database)
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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
linkwardenlinkwarden <= 2.14.0 -

II. Public POCs for CVE-2026-42455

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III. Intelligence Information for CVE-2026-42455

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IV. Related Vulnerabilities

Same product: linkwarden
Same vendor: linkwarden
Same weakness: CWE-79

V. Comments for CVE-2026-42455

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