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OpenAdvisories
Medium · 4.3 CVE-2026-45386 EUVD-2026-30632GHSA-5gc6-xhv4-2wg6PYSEC-2026-2705

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

Published May 15, 2026 · Updated May 19, 2026 · Assigned by GitHub_M

Description

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

VendorProductAffectedFixed
open-webui open-webui < 0.9.5 —

Affected packages

EcosystemPackageAffectedFixedRecord
PyPI open-webui < 0.9.5 0.9.5 GHSA-5gc6-xhv4-2wg6

References