GCD AI RADAR
incidents/AIR-2026-0504

CVE-2026-33309: Langflow Arbitrary File Write via v2 API

Attack on AI2 Disclosed vulnerabilityInfrastructure vulnerability

An arbitrary file write vulnerability exists in Langflow's file upload endpoint due to insufficient boundary containment checks in the storage layer. The flaw permits authenticated attackers to write files to arbitrary locations on the host.

disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why

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
2 · Disclosed vulnerability
CVE or vendor advisory, patched or patchable, no confirmed exploitation.
targets
Framework / tooling
products
Langflow
incident date
19 Mar 2026
first reported
19 Mar 2026
origin
GitHub Advisory Database
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-2026-33309 · arbitrary-file-write · langflow
record
created 2026-10-18 07:00Z · updated 2026-10-18 10:04Z · json

Sources · 2

  1. 2026-03-19
    CVE-2026-33309: Langflow has an Arbitrary File Write (RCE) via v2 API
    GitHub Advisory Database · github.com/advisories/GHSA-g2j9-7rj2-gm6c
  2. 2026-03-24
    CVE-2026-33309: Langflow is a tool for building and deploying AI-powered agents and workflows.
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-33309

Titles and links belong to their publishers. The summary above is written by GCD AI RADAR in its own words; data is CC BY-SA 4.0.

Related incidents