Logo
-

Byte Open Security

(ByteOS Network)

Log In

Sign Up

ByteOS

Security
Vulnerability Details
Registries
Custom Views
Weaknesses
Attack Patterns
Filters & Tools
CVE Vulnerability Details :
CVE-2026-45675
PUBLISHED
More InfoOfficial Page
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
View Known Exploited Vulnerability (KEV) details
Published At-15 May, 2026 | 19:12
Updated At-15 May, 2026 | 20:20
Rejected At-
▼CVE Numbering Authority (CNA)
Open WebUI: LDAP and OAuth First-User Race Condition Allows Multiple Admin Accounts

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, he LDAP and OAuth authentication flows use a TOCTOU (Time-of-Check-Time-of-Use) pattern for first-user admin role assignment. The regular signup handler (signup_handler in auths.py, line 663) was explicitly patched to prevent this race with the comment "Insert with default role first to avoid TOCTOU race", but the LDAP and OAuth code paths were never updated with the same fix. This vulnerability is fixed in 0.9.0.

Affected Products
Vendor
open-webui
Product
open-webui
Versions
Affected
  • < 0.9.0
Problem Types
TypeCWE IDDescription
CWECWE-269CWE-269: Improper Privilege Management
CWECWE-362CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Type: CWE
CWE ID: CWE-269
Description: CWE-269: Improper Privilege Management
Type: CWE
CWE ID: CWE-362
Description: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Metrics
VersionBase scoreBase severityVector
3.18.1HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Version: 3.1
Base score: 8.1
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/open-webui/open-webui/security/advisories/GHSA-h3ww-q6xx-w7x3
x_refsource_CONFIRM
https://github.com/open-webui/open-webui/pull/23626
x_refsource_MISC
https://github.com/open-webui/open-webui/commit/96a0b3239b1aadb23fc359bf10849c9ba12fd6ec
x_refsource_MISC
Hyperlink: https://github.com/open-webui/open-webui/security/advisories/GHSA-h3ww-q6xx-w7x3
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/open-webui/open-webui/pull/23626
Resource:
x_refsource_MISC
Hyperlink: https://github.com/open-webui/open-webui/commit/96a0b3239b1aadb23fc359bf10849c9ba12fd6ec
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/open-webui/open-webui/security/advisories/GHSA-h3ww-q6xx-w7x3
exploit
Hyperlink: https://github.com/open-webui/open-webui/security/advisories/GHSA-h3ww-q6xx-w7x3
Resource:
exploit
Details not found