CVE-2026-45807

Description

Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.43 and 1.3.19, several Kestra API endpoints accept a kestra:// URI from the client and pass it through StorageInterface.parentTraversalGuard before reading the underlying file from the local storage backend. The guard only inspects the literal URI.toString(), so a URL-encoded .. written as %2E%2E slips through. The downstream code then calls URI.getPath(), which decodes %2E%2E back to .., and the resulting path is handed to Paths.get(...) without normalization. The OS resolves the .. segments at open(2) time, so an authenticated user with a single execution can read any file the Kestra process has access to on the host filesystem (/etc/passwd, mounted secrets, other tenants' execution outputs, etc.). This vulnerability is fixed in 1.0.43 and 1.3.19.

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Produits concernés

• kestra-io kestra
• Kestra kestra

Scores CVSS

Faiblesses (CWE)

• CWE-22

Références

• https://github.com/kestra-io/kestra/security/advisories/GHSA-3529-p4wf-xp79 ExploitMitigationVendor Advisory
• https://github.com/kestra-io/kestra/security/advisories/GHSA-3529-p4wf-xp79 ExploitMitigationVendor Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories