What’s Vulnerable › Vulnerabilities

CVE-2026-45316: Open WebUI: Read-Only Users Can Toggle Note Pin Status via Incorrect Permission Check (Write via Read-Only Access)

• Severity: low (CVSS 3.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-05-15 · updated 2026-06-17
• Weakness: CWE-863

Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.3, the POST /api/v1/notes/{id}/pin endpoint performs a write operation (toggling the is_pinned field) but only checks for read permission. Users with read-only access to a shared note can pin/unpin it, which is a state-modifying action that should require write permission. This vulnerability is fixed in 0.9.3.

Affected products

• open-webui: before 0.9.3 — fixed in 0.9.3

How to fix

Upgrade to a fixed version: open-webui 0.9.3. Check the vendor advisory for mitigations.

References

• https://github.com/open-webui/open-webui/security/advisories/GHSA-jx2x-j75f-xq3j
• https://github.com/open-webui/open-webui/security/advisories/GHSA-jx2x-j75f-xq3j

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