Kestra: Unauthenticated Remote Code Execution via Authentication Bypass in `AuthenticationFilter`
En bref
Sévérité
CRITICAL 10.0
Exploitation
Exploitation connue (CISA KEV) · ajoutée le 2026-09-02 Exploitée selon l'ENISA depuis le 2026-09-02
EPSS
EPSS 2.10 % · centile 82 (2026-10-27)
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
GitHub_M
Statut NVD
Analyzed
Description
Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, AuthenticationFilter in Kestra OSS uses request.getPath().endsWith("/configs") to whitelist the public configuration endpoint from Basic Auth. Because the check is a suffix match rather than an exact path match, any API path whose last segment is configs bypasses authentication entirely. An unauthenticated remote attacker can exploit this to create and execute arbitrary workflows without credentials. Because Kestra ships with script execution plugins (plugin-script-shell, plugin-script-python, etc.) enabled by default, this directly results in unauthenticated Remote Code Execution as root inside the Kestra worker container. This vulnerability is fixed in 1.0.45 and 1.3.21.
