CVE-2026-45386

FAUCET Score

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.

First published: May 15, 2026Last modified: May 15, 2026

Impacted Technologies

Vendor	Product	Version(s)	CPE
		< 0.9.5CPE matchmatch criteria	cpe:2.3:a:openwebui:open_webui::::::::

CVSS Data

CVSS version used by this source: 3.1

4.3MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

Exploitability Score

2.8

Impact Score

1.4

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.20%

Probability of exploitation in next 30 days

EPSS Percentile

10.6%

Percentile rank of EPSS score among Peer Group

As of 2026-07-28

Model: v2026.06.15

This CVE's current EPSS score of 0.0020 is in the 9th percentile among its peer group of 21,977 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

pippatch availablevia ghsa

Product: open-webuiFixed in: 0.9.5

github_advisoryworkaround availablevia nvd_reference

View patch

Vendor Advisories (1)

pipGHSA-5gc6-xhv4-2wg6medium

Open WebUI has an IDOR vulnerability in the pin_channel_message API endpoint

May 14, 2026

References

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

ExploitMitigationVendor Advisory