CVE-2026-55255
Langflow Authorization Bypass Through User-Controlled Key Vulnerability
Summary
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.
Affected software
Vendor: Langflow · Product: Langflow
Weakness types (CWE):
What to do
This vulnerability appears in CISA's Known Exploited Vulnerabilities catalog, meaning it is being exploited in the wild. Prioritize patching affected systems and verify exposure across your estate.
Related vulnerabilities in Langflow
| CVE | Name | EPSS | Exploited |
|---|---|---|---|
| CVE-2025-3248 | Langflow Missing Authentication Vulnerability | 100.0% | Yes |
| CVE-2026-33017 | Langflow Code Injection Vulnerability | 99.8% | Yes |
| CVE-2025-34291 | Langflow Origin Validation Error Vulnerability | 83.6% | Yes |
| CVE-2026-0770 | Langflow Inclusion of Functionality from Untrusted Control Sphere Vulnerability | 53.5% | Yes |
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