Name: CVE-2026-55255: Authorization Bypass Through User-Controlled Key
Creator: Rapid7
Published: 2026-06-23T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-55255, CWE-639, Exploited in the Wild, CISA KEV Exploit, CVSS 8.4, EPSS 0.00887, CISA KEV

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 Details

CVSS 3.1 Base Score: 8.4
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Langflow Ai	—	Upgrade Langflow AI to the latest version	Jul 20, 2026	Jun 23, 2026

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CVSS Details

Covered by Rapid7

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