CVE-2025-34291

CVE-2025-34291 is actively exploited and listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added May 21, 2026. EIP tracks 2 public exploits from researchers including ridhinva, amnnrth. A Nuclei detection template is also available.

AI-analyzed exploit summary The repository contains a Python-based scanner for detecting potential exposure to CVE-2025-34291, a CORS misconfiguration vulnerability in Langflow. It checks for accessible endpoints but does not exploit the vulnerability.

Langflow versions up to and including 1.6.9 contain a chained vulnerability that enables account takeover and remote code execution. An overly permissive CORS configuration (allow_origins='*' with allow_credentials=True) 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. An attacker-controlled origin can therefore obtain fresh access_token / refresh_token pairs for a victim session. Obtained tokens permit access to authenticated endpoints — including built-in code-execution functionality — allowing the attacker to execute arbitrary code and achieve full system compromise.