All vulnerabilities
CVE-2026-49869GHSA-5vc5-wxxq-3fjx

Kestra OSS OS Command Injection Vulnerability

Kestra Kestra OSS
Open in ThreatlineRecord JSON
CVSS
10.0Critical
ExploitationExploited in the wildAdded to KEV 2 Sep 2026CISA KEV
Exploit odds (EPSS)2.10%Chance of exploitation activity in the next 30 days, higher than 81% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version yet
Federal deadline5 Sep 2026Remediation due date for US federal agenciesCISA KEV
CISA required actionApply 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. CISA KEV
Patching is not enoughCISA requires federal agencies to look for signs of compromise on affected systems, not only patch (forensic triage under BOD 26-04). Treat exposed systems as possibly compromised. CISA guidance

What fixes it

No source in this snapshot names a fixed version.

Timeline

  1. 26 Jun 2026, 20:58 UTCPublishedCVE List
  2. 2 Sep 2026Added to CISA KEVCISA KEV

Description

Kestra OSS contains an OS command injection vulnerability that could allow an unauthenticated remote attacker to create and execute arbitrary workflows without credentials.

Text from CVE List

Affected versions 2

  • kestraaffected: < 1.0.45CVE List
  • kestraaffected: >= 1.1.0, < 1.3.21CVE List

References 3