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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:NKestra
APPKestra< 1.0.431.1.0 – 1.3.19 (bez)
Related vulnerabilities
Kestra: Auth Bypass umożliwiający nieuwierzytelniony RCE jako root
Kestra: Pominięcie uwierzytelnienia REST API prowadzące do RCE jako root
SQL Injection w Kestra — wstrzykiwanie zapytań przez parametr GET
SQL Injection prowadzący do RCE w platformie Kestra (endpoint wyszukiwania flows)
Kestra is an open-source, event-driven orchestration platform. Prior to 1.3.24, this vulnerability exists in t...