Vulnerability details
CVE-2026-44551
open-webui open-webui
Open WebUI: LDAP Empty Password Authentication Bypass
CVSS 3.1
9.1Critical
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.1Critical | 3.1 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| open-webui | open-webui | < 0.9.0 | CVEProject cvelistV5 (CNA) |
References and advisories
1- https://github.com/open-webui/open-webui/security/advisories/GHSA-2r4p-jpmg-48f4 x_refsource_CONFIRM
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Details
- Published
- 2026-05-15
- Last updated
- 2026-05-19
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
1.46%
Probability of exploitation in 30 days
73.7%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-287Improper Authentication