CVE-2026-55255

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.1, an Insecure Direct Object Reference (IDOR) vulnerability in /api/v1/responses endpoint allows an authenticated attacker to execute any flow belonging to another user by specifying the victim's flow ID in the request. This vulnerability is fixed in 1.9.1.

CVSS v3 8.4 HIGH

8.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact LOW

Scope CHANGED

References

Link	Resource
https://github.com/langflow-ai/langflow/commit/2c9f498d664a3c32698b57d7c5e752625291060e	Patch
https://github.com/langflow-ai/langflow/pull/12832	Issue Tracking Patch
https://github.com/langflow-ai/langflow/security/advisories/GHSA-qrpv-q767-xqq2	Exploit Mitigation Vendor Advisory
https://github.com/langflow-ai/langflow/security/advisories/GHSA-qrpv-q767-xqq2	Exploit Mitigation Vendor Advisory
https://webflow.sysdig.com/blog/understanding-langflow-cve-2026-55255-and-why-higher-cvss-vulnerabilities-arent-always-the-most-exploited	Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-55255	US Government Resource

Configurations

Configuration 1 (hide)

cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-06-23 17:17

Updated : 2026-07-08 13:39

NVD link : CVE-2026-55255

Mitre link : CVE-2026-55255

CVE.ORG link : CVE-2026-55255

JSON object : View

Products Affected

langflow

langflow

CWE

CWE-639

Authorization Bypass Through User-Controlled Key

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