Risk Letters

Exploited vulnerability

CVE-2026-49869

TLP:CLEAR

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.

Facts

  • Vendor: Kestra
  • Product: Kestra OSS
  • CVSS: 10
  • EPSS (probability of exploitation within 30 days): 2.1 %
  • On CISA's Known Exploited Vulnerabilities list since: 2 September 2026
  • First known exploitation: 2 September 2026
  • CISA's deadline for US federal agencies: 5 September 2026
  • Weakness: CWE-78
  • First seen by Risk Letters: 26 June 2026

Members see which Nordic sectors the flaw hits, and what to do about it.

Get the full brief

Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD