Medium severity · published Oct 12, 2026
CVE-2026-109285
Open WebUI 0.6.0 before 0.11.4 Improper Access Control via Stale File Metadata
5.0
CVSS
0.2%
EPSS
No
On KEV
Description
Open WebUI from 0.6.0 before 0.11.4 contains an improper access control vulnerability in has_access_to_file that lets former knowledge base collaborators keep file access via stale cached knowledge base references. Attackers with read or write grants can download removed files through the file content endpoint or delete them, including from the owner's private knowledge bases.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 15% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
open-webui · open-webui
0.6.0 before 0.11.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-109285
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-109285
vendor-advisory
https://github.com/open-webui/open-webui/security/advisories/GHSA-9cxp-636w-4997
third-party-advisory
https://www.vulncheck.com/advisories/open-webui-0.6.0-before-0.11.4-improper-access-control-via-stale-file-metadata
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