Low severity · published May 15, 2026
CVE-2026-45316
Open WebUI: Read-Only Users Can Toggle Note Pin Status via Incorrect Permission Check (Write via Read-Only Access)
3.5
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 14% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
open-webui · open-webui
< 0.9.3 · source: vendor
OW
Open Webui · Openwebui
before 0.9.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-45316
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-45316
Exploit
https://github.com/open-webui/open-webui/security/advisories/GHSA-jx2x-j75f-xq3j
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