CVE-2026-45316

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.

PUBLISHED Reserved 2026-05-11 | Published 2026-05-15 | Updated 2026-05-18 | Assigner GitHub_M

Problem types

CWE-863: Incorrect Authorization

Product status

References

github.com/...-webui/security/advisories/GHSA-jx2x-j75f-xq3j exploit

github.com/...-webui/security/advisories/GHSA-jx2x-j75f-xq3j

cve.org (CVE-2026-45316)

nvd.nist.gov (CVE-2026-45316)

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