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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| kestra-io | kestra | < 1.0.45; >= 1.1.0, < 1.3.21 |
References
- https://github.com/kestra-io/kestra/security/advisories/GHSA-5vc5-wxxq-3fjxExploit, Vendor Advisory
- https://github.com/kestra-io/kestra/security/advisories/GHSA-5vc5-wxxq-3fjxExploit, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-49869US Government Resource
Timeline
- Published
- Jun 26, 2026
- Last modified
- Oct 25, 2026
- Added to CISA KEV
- Sep 2, 2026
- NVD status
- Analyzed