PT-2026-41188 · Unknown · Open-Webui

Published 2026-05-10 · Updated 2026-05-19 · CVE-2026-45386

Positive Technologies (AI Summary)

CVSS v3.1

4.3

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Name of the Vulnerable Software and Affected Versions Open WebUI versions prior to 0.9.5

Description In standard channels, the pin and unpin operation incorrectly verifies only read permissions instead of write permissions. This allows users with read-only access to modify the is pinned, pinned by, and pinned at fields of any message. The issue occurs within the pin channel message() function at the '/{id}/messages/{message id}/pin' endpoint, where the channel has access() function is called with the permission variable set to 'read'.

Recommendations Update to version 0.9.5.

Exploit

Fix

IDOR

Weakness Enumeration

CWE-639

Related Identifiers

BDU:2026-07132

CVE-2026-45386

GHSA-5GC6-XHV4-2WG6

Affected Products

Open-Webui

References · 9

• 🔥 https://github.com/open-webui/open-webui/security/advisories/GHSA-5gc6-xhv4-2wg6 · Exploit
• https://bdu.fstec.ru/vul/2026-07132 · Security Note
• https://osv.dev/vulnerability/GHSA-5gc6-xhv4-2wg6 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-45386 · Security Note
• https://github.com/open-webui/open-webui · Note
• https://github.com/open-webui/open-webui/releases/tag/v0.9.5 · Note
• https://t.me/CVEtracker/53962 · Telegram Post
• https://t.me/cveNotify/163954 · Telegram Post
• https://twitter.com/CVEnew/status/2055457518264987828 · Twitter Post