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CVE-2026-49869: Kestra OSS OS Command Injection Vulnerability

criticalknown exploitedpublic exploitCVE-2026-49869
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Kestra OSS contains an OS command injection vulnerability that could allow an unauthenticated remote attacker to create and execute arbitrary workflows without credentials.

CSIRTS triage

vendor: Kestraproduct: Kestra OSSRemote code executionCode injection
What
Kestra OSS contains an OS command injection vulnerability allowing unauthenticated remote attackers to create and execute arbitrary workflows.
Who is affected
All deployments of Kestra OSS that are network-accessible without authentication enabled.
Urgency
Critical; actively exploited and requires no authentication to trigger remote code execution.
Action
Update Kestra OSS to a patched version as soon as available.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2026-09-02
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-49869

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-49869coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

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