CVE-2026-55255

8.4 HIGH CISA KEV - Actively Exploited
Published: June 23, 2026 Modified: July 08, 2026
View on NVD

Description

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/langflow-ai/langflow/commit/2c9f498d664a3c32698b57d7c5e752625291060e
Source: security-advisories@github.com
Patch
https://github.com/langflow-ai/langflow/pull/12832
Source: security-advisories@github.com
Issue Tracking Patch
https://github.com/langflow-ai/langflow/security/advisories/GHSA-qrpv-q767-xqq2
Source: security-advisories@github.com
Exploit Mitigation Vendor Advisory
https://github.com/langflow-ai/langflow/security/advisories/GHSA-qrpv-q767-xqq2
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Exploit Mitigation Vendor Advisory
https://webflow.sysdig.com/blog/understanding-langflow-cve-2026-55255-and-why-higher-cvss-vulnerabilities-arent-always-the-most-exploited
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-55255
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
US Government Resource

6 reference(s) from NVD

Quick Stats

CVSS v3 Score
8.4 / 10.0
EPSS (Exploit Probability)
29.1%
98th percentile
Exploitation Status
Actively Exploited
Remediation due: 2026-07-10

Weaknesses (CWE)

CWE-639

Affected Vendors

langflow

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