CVE-2026-44671
HighSummary
In ZITADEL, an identity management platform, a vulnerability was discovered in the LDAP identity provider implementation that improperly handles user-provided usernames in LDAP search filters. This allows unauthenticated attackers to perform LDAP Filter Injection during the login process.
Risk Assessment
An attacker can exploit LDAP metacharacters to conduct blind LDAP injection, enabling the enumeration of valid usernames and extraction of sensitive data from the connected LDAP directory. While it does not allow for full authentication bypass, it poses a significant threat to data security.
Recommendation
It is recommended to update ZITADEL to version 3.4.10 or 4.15.0 to mitigate this vulnerability. Additionally, conducting a security audit is advisable to minimize risks associated with LDAP injection.
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Original NVD description (English source)
ZITADEL is an open source identity management platform. From 2.71.11 to before 3.4.10 and 4.15.0, a vulnerability was discovered in Zitadel's LDAP identity provider implementation, which fails to properly escape user-provided usernames before incorporating them into LDAP search filters. This allows unauthenticated attackers to perform LDAP Filter Injection during the login process. While this vulnerability does not allow for a full authentication bypass, an attacker can use LDAP metacharacters (such as *, (, )) to perform blind LDAP injection. By observing the different failure (or success) responses, an attacker can systematically enumerate valid usernames and extract sensitive attribute data from the connected LDAP directory. This vulnerability is fixed in 3.4.10 and 4.15.0.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS