CVE-2026-87016: Open WebUI OAuth Account Takeover via SQLite Wildcards

# CVE-2026-87016: Open WebUI OAuth Account Takeover via SQLite Wildcards

https://gcdradar.vercel.app/incidents/cve-2026-87016-open-webui-oauth-account-takeover-via-sqlite · AIR-2026-0932 · closed 2026-09-09

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-09-09 (happened 2026-09-10)
- AI role: Attack on AI
- Products: Open WebUI
- CVE ids: CVE-2026-87016
- CVSS: 8.1

## Summary

Open WebUI on SQLite deployments performed substring matches during OAuth identity mapping, allowing wildcard characters in subject claims to impersonate other users. A patch addresses the identity resolution flaw.

## What to do

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

## Latest updates

- 2026-09-10: CVE-2026-87016: Open WebUI: Sign-in as another user via wildcard characters in the OAuth subject claim on SQLite (https://github.com/advisories/GHSA-wpmr-8h3q-fwj7)
- 2026-09-09: CVE-2026-87016: Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. (https://nvd.nist.gov/vuln/detail/CVE-2026-87016)

## Sources

- 2026-09-09 NVD: CVE-2026-87016: Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. https://nvd.nist.gov/vuln/detail/CVE-2026-87016
- 2026-09-10 GitHub Advisory Database: CVE-2026-87016: Open WebUI: Sign-in as another user via wildcard characters in the OAuth subject claim on SQLite https://github.com/advisories/GHSA-wpmr-8h3q-fwj7

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