CVE-2026-86542

Summary

knowns before 0.30.0 fails to validate import names in the import routes, allowing unauthenticated attackers to write files outside the imports directory. Attackers can supply traversal sequences in the name parameter to escape the imports directory and overwrite arbitrary files writable by the server process.

Affected Software

Weaknesses

• CWE-22: CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

References

• https://github.com/knowns-dev/knowns/security/advisories/GHSA-wh3c-v55g-qfg8
• https://github.com/knowns-dev/knowns/blob/v0.29.1/internal/server/routes/imports.go#L519-L551
• https://github.com/knowns-dev/knowns/blob/v0.29.1/internal/server/routes/imports.go#L376-L420
• https://github.com/knowns-dev/knowns/commit/d3989829fb5095666d23d005b2f78a082832a396
• https://github.com/knowns-dev/knowns/releases/tag/v0.30.0
• https://www.vulncheck.com/advisories/knowns-before-0.30.0-path-traversal-via-import-name

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