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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 arbi
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:d90d81c4a2c83f3300d04e1d7c696f5df04b10030f5875f2d1e51764b2e74201
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"linkwarden","vendor":"linkwarden","versions":[{"status":"affected","version":"<= 2.14.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:8effa17e09928d722425632ceb7ef0fe898aa515325bcd9bc3d47430334d1a44 · sha256:e6e8d2abebd9dc4a… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.8,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:8effa17e09928d722425632ceb7ef0fe898aa515325bcd9bc3d47430334d1a44 · sha256:e6e8d2abebd9dc4a… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:8effa17e09928d722425632ceb7ef0fe898aa515325bcd9bc3d47430334d1a44 · sha256:e6e8d2abebd9dc4a… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/linkwarden/linkwarden/security/advisories/GHSA-fjvg-mch3-j3vg","tags":["x_refsource_CONFIRM"],"url":"https://github.com/linkwarden/linkwarden/security/advisories/GHSA-fjvg-mch3-j3vg"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8effa17e09928d722425632ceb7ef0fe898aa515325bcd9bc3d47430334d1a44 · sha256:e6e8d2abebd9dc4a… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/linkwarden/linkwarden/security/advisories/GHSA-fjvg-mch3-j3vg"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8effa17e09928d722425632ceb7ef0fe898aa515325bcd9bc3d47430334d1a44 · sha256:e6e8d2abebd9dc4a… · /containers/adp/0/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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