VULNERABILITY INTELLIGENCE

CVE-2026-49869

CVSS score10 CRITICAL
EPSS probability2.10%
CISA KEVKnown exploited vulnerability
Published2026-06-26
Last modified2026-10-25
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Known Exploited Vulnerability

Kestra OSS OS Command Injection Vulnerability

Vendor / product: Kestra / Kestra OSS

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.

Weakness classification

  • CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
  • CWE-184: Incomplete List of Disallowed Inputs
  • CWE-287: Improper Authentication
  • CWE-918: Server-Side Request Forgery (SSRF)

Primary references