by Kastro
Paper/Archive/CVE-2026-86542

CVE-2026-86542

knowns-dev knowns — knowns before 0.30.0 Path Traversal via Import Name

EPSS 0.7%CVSS 9.1
critical.is priorityof 100
38
CVSS 9.1 (CNA)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 54.6.546 × 2010.9No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
knowns< 0.30.00.30.0CNA

Scores by source

VulnCheck (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
VulnCheck (CNA)8.8CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: partial

References

advisorygithub.com/knowns-dev/knowns/security/advisories/GHSA-wh3c-v55g-qfg8writeupgithub.com/knowns-dev/knowns/blob/v0.29.1/internal/server/routes/imports.go#L519-L551writeupgithub.com/knowns-dev/knowns/blob/v0.29.1/internal/server/routes/imports.go#L376-L420patchgithub.com/knowns-dev/knowns/commit/d3989829fb5095666d23d005b2f78a082832a396refgithub.com/knowns-dev/knowns/releases/tag/v0.30.0writeupvulncheck.com/advisories/knowns-before-0.30.0-path-traversal-via-import-name