Exposures › CVE-2025-34291
Langflow's overly permissive CORS and SameSite=None cookie settings enable cross-origin credential theft leading to full system compromise.
This vulnerability allows attackers to bypass origin validation and steal refresh tokens via cross-origin requests, granting full system access. DIB organizations must ensure Langflow deployments use strict CORS policies and secure cookie attributes to prevent unauthorized authentication token theft.
Shame score — The combination of overly permissive CORS and SameSite=None cookies creates a high-risk attack surface that enables credential theft and full system compromise.
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.
No correlated FedRAMP products.