CVE-2026-44551: Open WebUI: LDAP Empty Password Authentication Bypass
Affected: open-webui · Exploitation: check available, not yet exploited
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 73% of scored CVEs
DescriptionCVE.org
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.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- open-webui · open-webui< 0.9.0
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Check available, not yet exploited. A public nuclei template can confirm it on a system you are authorised to test.
- CISA KEV
- Not listed
- Public check
- Open WebUI 'LDAP Empty Password' - Authentication Bypass · nuclei template in projectdiscovery/nuclei-templates
- Vendor
- open-webui
- Published
- May 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-44551 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.