HIGH 8.7 NVD
CVE-2026-86538
knowns versions before 0.30.0 contain a path traversal vulnerability in the POST /api/templates/preview endpoint that allows unauthenticated attackers to read a
knowns versions before 0.30.0 contain a path traversal vulnerability in the POST /api/templates/preview endpoint that allows unauthenticated attackers to read arbitrary files. Attackers can supply directory traversal sequences in the templateFile parameter to bypass path restrictions and read sensitive files like credentials and configuration through the JSON response.
References
- https://github.com/knowns-dev/knowns/blob/v0.29.1/internal/server/routes/templates.go#L299
- https://github.com/knowns-dev/knowns/commit/09c5a96fd5817b941dc86669278c1a17db10ed4e
- https://github.com/knowns-dev/knowns/releases/tag/v0.30.0
- https://github.com/knowns-dev/knowns/security/advisories/GHSA-fpxv-c555-rhm3
- https://www.vulncheck.com/advisories/knowns-before-0.30.0-path-traversal-via-templatefile-
This high severity vulnerability with a CVSS score of 8.7 was published on 2026-09-07 via NVD.
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