CVE-2026-55255
KEVLangflow Authorization Bypass Through User-Controlled Key Vulnerability
View CVE record →- Vendor / Project
- Langflow
- Product
- Langflow
- Date added
- Jul 7, 2026
- Due date
- Jul 10, 2026
- Known ransomware use
- Unknown
- CWEs
- CWE-639
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.
Required action
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Notes
- https://github.com/langflow-ai/langflow/security/advisories/GHSA-qrpv-q767-xqq2
- BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk
- Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk
- https://nvd.nist.gov/vuln/detail/CVE-2026-55255