PT-2026-41183 · Unknown · Open-Webui

Published 2026-03-26 · Updated 2026-05-16 · CVE-2026-45365

Positive Technologies (AI Summary)

CVSS v2.0

5.5

Medium

Base vector

AV:N/AC:L/Au:S/C:P/I:P/A:N

Name of the Vulnerable Software and Affected Versions Open WebUI versions prior to 0.8.11

Description An internal-only bypass filter parameter is exposed on the '/openai/chat/completions' and '/ollama/api/chat' HTTP endpoints due to FastAPI query string binding. This allows any authenticated user to append ?bypass filter=true to the request URL, skipping model access control checks and enabling the invocation of admin-restricted models using the server's API keys.

Recommendations Update to version 0.8.11 or later.

Exploit

Fix

Improper Authorization

Weakness Enumeration

CWE-285

Related Identifiers

BDU:2026-07440

CVE-2026-45365

GHSA-V6QF-75PR-P96M

Affected Products

Open-Webui

References · 9

• 🔥 https://github.com/open-webui/open-webui/security/advisories/GHSA-v6qf-75pr-p96m · Exploit
• https://bdu.fstec.ru/vul/2026-07440 · Security Note
• https://osv.dev/vulnerability/GHSA-v6qf-75pr-p96m · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-45365 · Security Note
• https://github.com/open-webui/open-webui · Note
• https://github.com/open-webui/open-webui/commit/c0385f60ba049da48d2d5452068586d375303c37 · Note
• https://github.com/open-webui/open-webui/releases/tag/v0.8.11 · Note
• https://twitter.com/CVEnew/status/2055457506248302795 · Twitter Post
• https://t.me/CVEtracker/53987 · Telegram Post