GCD AI RADAR
incidents/AIR-2026-0026

Langflow IDOR Vulnerability Allows Unauthorized Flow Execution

Attack on AI3 Confirmed exploitationInfrastructure vulnerability

Langflow prior to version 1.9.1 contains an Insecure Direct Object Reference vulnerability in its API responses endpoint. Attackers can execute arbitrary flows belonging to other users, with exploitation confirmed in the wild.

Details

type
Attack on AI
An AI model, agent or AI-powered product was the thing exploited, abused or leaked.
categories
  • Infrastructure vulnerability
    CVEs and advisories in AI frameworks, inference servers, MCP servers, AI developer tools and hosting stacks.
owasp llm top 10
mitre atlas
no technique for these categories
Both rows are derived from the type and categories (OWASP 2025 edition, ATLAS release 2026.09), not classified per record. How
severity
3 · Confirmed exploitation
Used against real targets; limited or unclear impact.
targets
Framework / tooling
products
Langflow
incident date
23 Jun 2026
first reported
19 Jun 2026
origin
NVD
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
classifier confidence
0.95 · published at or above 0.80; see the methodology
tags
CVE-2026-55255 · langflow · idor · cisa-kev
record
created 2026-10-18 06:33Z · updated 2026-10-18 07:00Z · json

Sources · 2

  1. 2026-06-19
    CVE-2026-55255: Langflow: IDOR Vulnerability in `/api/v1/responses` Endpoint Allows Authenticated Attackers to Access Another User's Flow
    GitHub Advisory Database · github.com/advisories/GHSA-qrpv-q767-xqq2
  2. 2026-06-23
    CVE-2026-55255: Langflow is a tool for building and deploying AI-powered agents and workflows.
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-55255

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