CVE-2026-86542: Knowns-Dev Knowns

Critical severity, CVSS 9.1. EPSS: 0.7% chance of exploitation in the next 30 days.

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 products

• Knowns-Dev Knowns: before 0.30.0 (fixed in 0.30.0)

Published 2026-09-07. Last modified 2026-09-08.