CVE-2026-86542CWE-22path-traversal

CVE-2026-86542

Critical · published September 8, 2026

CVSS v3.1
9.1
EPSS
1%
Percentile
54.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
CVSS v4.0
8.8 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00740 · 54.1th percentile
Weakness
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2026-09-08T03:16Z
References (6)
https://github.com/knowns-dev/knowns/blob/v0.29.1/internal/server/routes/imports.go#L376-L420 · [email protected]https://github.com/knowns-dev/knowns/blob/v0.29.1/internal/server/routes/imports.go#L519-L551 · [email protected]https://github.com/knowns-dev/knowns/commit/d3989829fb5095666d23d005b2f78a082832a396 · [email protected]https://github.com/knowns-dev/knowns/releases/tag/v0.30.0 · [email protected]https://github.com/knowns-dev/knowns/security/advisories/GHSA-wh3c-v55g-qfg8 · [email protected]https://www.vulncheck.com/advisories/knowns-before-0.30.0-path-traversal-via-import-name · [email protected]
EPSS history
Timeline
  • 09 SEP 03:20Z
    EPSS moved — → 0%
    epss
  • 07 SEP 23:03Z
    knowns before 0.30.0 Path Traversal via Import Name
    cvelistv5