CVE-2026-70482

8.1 HIGHpublic exploit available

Published 2026-08-04 · Updated 2026-08-06

AI risk analysis

Summary: The flaw allows unauthorized access to an Open WebUI session by exchanging a raw OAuth token, posing a significant security risk.
Exploitability: Exploitation requires holding an access token from a registered client and setting ENABLE_OAUTH_TOKEN_EXCHANGE=True, making it moderately exploitable.
Blast radius: If exploited, this could lead to unauthorized access and control over the Open WebUI platform, impacting multiple users and applications.
Prioritized remediation: Update to version 0.11.0 or disable ENABLE_OAUTH_TOKEN_EXCHANGE until a patch is available.

auth-bypasswebapisecurity

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.8.0 until 0.11.0, when ENABLE_OAUTH_TOKEN_EXCHANGE=True, /oauth/{provider}/token/exchange accepts a raw provider access token and validates it by calling the provider userinfo endpoint without confirming which OAuth client the token was issued to. Anyone holding an access token minted for any client registered with the same provider could exchange it for an Open WebUI session as that token user, including applications the operator does not control and has never authorized. This issue is fixed in 0.11.0.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Weaknesses

CWE-287

Public exploit & PoC references

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.