CVE-2026-44551: open-webui · Improper Authentication
Affects open-webuiSource GCVE Database
Not known to be exploited · public detection template (Nuclei) · CVSS 9.1 Critical : upgrade to 0.9.0 as a priority.
Data as of 11 Nov 2026, 23:07 UTC
Thin evidence
One scorer or none| CNA (GitHub_M) | CVSS 3.1 | 9.1 |
|---|
- Patch
- Available – fixed in 0.9.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:NExploitation evidence
Disclosed: evidence found.
CVE published 15 May 2026
Detectable: evidence found.
nuclei template: Open WebUI 'LDAP Empty Password' - Authentication Bypass
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.
What to do
Upgrade open-webui to 0.9.0.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| open-webui open-webui | Affected
| Fixed in
|
Description
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the LDAP authentication endpoint does not validate that the submitted password is non-empty before performing a Simple Bind against the LDAP server. The LdapForm Pydantic model accepts password: str with no minimum length constraint, so an empty string passes validation. The subsequent Connection.bind() call succeeds on vulnerable LDAP servers, and the application issues a full session token for the target user. This vulnerability is fixed in 0.9.0.