CVE-2026-49869

Kestra: Unauthenticated Remote Code Execution via Authentication Bypass in `AuthenticationFilter`

CVSS 10 critical · kestra-io kestra · published 2026-06-26

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.

NVD · CVE.org

Coverage 1 source

1. 2026-09-02 CISA Cybersecurity Advisories high CISA Adds Seven Known Exploited Vulnerabilities to Catalog

   CISA added 7 new vulnerabilities to its Known Exploited Vulnerabilities Catalog.

Mentioned with

CVE-2026-48710 CVE-2026-59822 CVE-2026-82329 CVE-2026-9586

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