CVE-2026-45386 — 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_pinn…
Published: 2026-05-15 · CVSS: 4.3 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7