CVE-2025-34291: Langflow Origin Validation Error Vulnerability. Langflow
Langflow Origin Validation Error Vulnerability. Langflow contains an origin validation error vulnerability in which an overly permissive CORS configuration combined with a refresh token cookie configured as SameSite=None allows a malicious webpage to perform cross-origin requests that include credentials and successfully call the refresh endpoint. This could allow the attacker to execute arbitrary code and achieve full system compromise via obtained tokens that permit access to authenticated endpoints.
- CISA KEV-listed (remediation due 2026-06-04)
- EPSS 32.7% (97.0% percentile)