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CVE Vulnerability Details :

CVE-2026-45386

PUBLISHED

More Info Official Page

Assigner-GitHub_M

Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa

Published At-15 May, 2026 | 20:36

Updated At-15 May, 2026 | 20:36

▼CVE Numbering Authority (CNA)

Open WebUI: An IDOR vulnerability exists in the pin_channel_message API endpoint

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, Pin/Unpin is a write operation (modifies the message's is_pinned , pinned_by, pinned_at fields), but in standard channels it only checks read permission, allowing users with read-only access to pin/unpin any message. This vulnerability is fixed in 0.9.5.

Affected Products

Vendor

open-webui

Product

open-webui

Versions

Affected

< 0.9.5

Problem Types

Type	CWE ID	Description
CWE	CWE-639	CWE-639: Authorization Bypass Through User-Controlled Key

Type: CWE

CWE ID: CWE-639

Description: CWE-639: Authorization Bypass Through User-Controlled Key

Metrics

Version	Base score	Base severity	Vector
3.1	4.3	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Version: 3.1

Base score: 4.3

Base severity: MEDIUM

Vector:

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

References

Hyperlink	Resource
https://github.com/open-webui/open-webui/security/advisories/GHSA-5gc6-xhv4-2wg6	x_refsource_CONFIRM

Hyperlink: https://github.com/open-webui/open-webui/security/advisories/GHSA-5gc6-xhv4-2wg6

Resource:

x_refsource_CONFIRM

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