Kestra: Unauthenticated Remote Code Execution via Authentication Bypass in `AuthenticationFilter`
48Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 10epss 0.9%
from disclosure to weapon4 days
Published on NVDJun 26
1st PoC+4d
exploitation probability
0.9%top 44% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Affected products
kestra-io · kestrapublic PoCs found — 1
githubgithub.com/Ap0dexMe0/CVE-2026-49869★ 2⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.