CVE entry · CVE-2026-49869
CVE-2026-49869: Kestra OSS OS Command Injection Vulnerability
Kestra OSS contains an OS command injection vulnerability that could allow an unauthenticated remote attacker to create and execute arbitrary workflows without credentials.
- Actively exploited: added to CISA’s KEV catalog on September 2, 2026.
- Use by ransomware: not established so far.
- Remediation deadline for US federal agencies: September 5, 2026.
Description from CISA’s KEV catalog.
What to do
- Check whether your estate includes Kestra OSS, including internet-facing devices.
- Apply the vendor’s patch or mitigations (references below). Failing that, isolate the product or stop using it, as CISA requires of US federal agencies.
- An exploited vulnerability has often been used before it was fixed: look for signs of compromise, especially on internet-facing devices.