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

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

https://gcdradar.vercel.app/incidents/cve-2026-59216-open-webui-cross-user-code-interpreter-and-to · AIR-2026-0861 · closed 2026-07-09

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-07-09 (happened 2026-07-24)
- AI role: Attack on AI
- Products: Open WebUI
- CVE ids: CVE-2026-59216
- CVSS: 7.7

## Summary

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.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

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

## Sources

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

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.