CVE-2026-86542

Critical

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.

SeverityCritical

CVSS9.1

Exploit probability—

ProductKnowns

PublishedSep 7, 2026

First seenSep 7, 2026

Weakness typeCWE-22Path traversal

How to fix

Update

knowns-dev knowns0.30.0 or later

Patches

github.com/knowns-dev/knowns/commit/d3989829fb5095666d23d005b2f78a082832a396

Vendor advisories

github.com/knowns-dev/knowns/security/advisories/GHSA-wh3c-v55g-qfg8
github.com/knowns-dev/knowns/releases/tag/v0.30.0

Affected products

Product	Affected versions	Fixed in
knowns-dev knowns	v < 0.30.0	0.30.0

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