GCD AI RADAR
incidents/AIR-2026-0861

CVE-2026-59216: Open WebUI cross-user code-interpreter and tool execution

Attack on AI2 Disclosed vulnerabilityInfrastructure vulnerability

Open WebUI suffers from a session validation flaw in Socket.IO event handlers, enabling authenticated users to run code interpreters inside other users' active sessions. This allows attackers to hijack tool execution and run arbitrary commands.

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
Open WebUI
incident date
24 Jul 2026
first reported
9 Jul 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-2026-59216 · open-webui · session-hijacking
record
created 2026-10-18 07:00Z · updated 2026-10-18 10:04Z · json

Sources · 2

  1. 2026-07-09
    CVE-2026-59216: Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform.
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-59216
  2. 2026-07-24
    CVE-2026-59216: Open WebUI: Cross-user code-interpreter and tool execution via unvalidated Socket.IO event-caller session_id
    GitHub Advisory Database · github.com/advisories/GHSA-74h3-cxq7-vc5q

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