CVE-2026-55255
Authorization Bypass Through User-Controlled Key in Langflow. CISA confirmed attackers exploit it and added it to its Known Exploited Vulnerabilities catalog on 7 July 2026.
- Product
- Langflow
- Added to CISA's catalog
- Federal fix-by date
- Ransomware
- No known use in ransomware campaigns
- Sources
- CISA’s catalog, NVD entry
CISA’s description.
Langflow contains an authorization bypass through user-controlled key vulnerability which allows an authenticated attacker to execute any flow belonging to another user by specifying the victim's flow ID in the request.
More from Langflow this year.
- CVE-2026-0770 Inclusion of Functionality from Untrusted Control Sphere, added
- CVE-2025-34291 Origin Validation Error, added
- CVE-2026-33017 Code Injection, added
Every flaw CISA confirmed exploited in the last 30 days is on the exploit watch. This is not security advice. Check the vendor’s advisory before acting. From CISA’s catalog of 4 November 2026.