CISA Adds MLflow SSRF Vulnerability CVE-2026-64849 to Known Exploited Catalog

On August 19, 2026, CISA announced the addition of CVE-2026-64849 to the Known Exploited Vulnerabilities (KEV) Catalog. The vulnerability is a Server-Side Request Forgery (SSRF) flaw affecting MLflow, an open-source platform for machine learning lifecycle management. CISA identified evidence of active exploitation in the wild, classifying the flaw as a frequent attack vector for malicious cyber actors. The KEV listing poses significant risks to the federal enterprise. Binding Operational Directive (BOD) 26-04: Prioritizing Security Updates Based on Risk establishes vulnerability management requirements for Federal Civilian Executive Branch (FCEB) agencies. The directive requires these agencies to prioritize rapid remediation of KEV Catalog vulnerabilities on publicly exposed assets that grant total control of the asset post-exploitation. BOD 26-04 also establishes expectations for agencies to check whether threat actors compromised the system before the patch was applied. While the directive applies only to FCEB agencies, CISA encourages all organizations to adopt risk-based vulnerability management and prioritize remediation of KEV Catalog vulnerabilities. CISA will continue to add vulnerabilities to the catalog that meet the specified criteria. Organizations aware of exploited vulnerabilities not currently listed are encouraged to submit them via CISA's KEV Nomination Form. The KEV entry requires a CVE ID, evidence of exploitation, and clear mitigation guidance for potential addition.