CVE-2026-49869 Exploited in the wild
Kestra OSS OS Command Injection Vulnerability
- Risk score
- 95/100
- CVSS
- 10.0 v3.1
- Published
- 26 Jun 2026
- Added to CISA's exploited list
- 2 Sep 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 who…
- Affected
- Kestra Oss before 1.0.45, 1.3.21
- Fix
- Upgrade Kestra Oss to 1.0.45 or 1.3.21 (whichever matches your release line), or later.
- Exploitation
- Exploited in the wild
Story map
At a glance
Kestra Oss: Red, act today. 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 who…
The flaws
- CVE-2026-49869: Kestra OSS OS Command Injection Vulnerability (CVSS 10.0 · exploited)
The fix
Upgrade Kestra Oss: 1.0.45 · 1.3.21 or later on your release line
Who is exposed: Kestra Oss before 1.0.45, 1.3.21
Where it stands
- Exploited in the wild
- On CISA's exploited list since 2 Sep
- US federal deadline 5 Sep
How it unfolded
- 2 Sep, CISA (official): Added to the Known Exploited Vulnerabilities list
- 5 Sep, Deadline (official): US federal agencies must have patched
Connects to
- Same weakness: OS command injection (CWE-78). 309 other warnings in 30 days
Why it is Red
- CVSS 10.0 critical
- Exploited in the wild (CISA KEV)
- Public exploit or proof of concept referenced
- Remotely exploitable without logging in
CISA required action
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
References
Original 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.
Last activity 2 Sep 2026. Patch Forecast updates every hour.