Vulnerability · Published Sep 7, 2026 · Assigned by VulnCheck
CVE-2026-86542knowns before 0.30.0 Path Traversal via Import Name
Critical 9.1
In plain English
A critical-severity path traversal in knowns from knowns-dev. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 55% of all known vulnerabilities).
Severity (CVSS 3.1)9.1Critical
Exploit odds (30 days)0.7%top 45.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| knowns-dev | knowns | 0 – before 0.30.0 |
Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
References
- GitHub Security Advisory (GHSA-wh3c-v55g-qfg8) vendor-advisory
- Import add builds the destination from the caller-supplied name (v0.29.1) technical-description
- gitCloneImport writes cloned files beneath the unvalidated name (v0.29.1) technical-description
- knowns fix commit d3989829fb50 patch
- knowns v0.30.0 Release Notes release-notes
- VulnCheck Advisory: knowns before 0.30.0 Path Traversal via Import Name third-party-advisory