Zitadel up to 3.4.9/4.14.x ldap injection

Summaryinfo

A vulnerability marked as problematic has been reported in Zitadel up to 3.4.9/4.14.x. Affected is an unknown function. Performing a manipulation results in ldap injection. This vulnerability is identified as CVE-2026-44671. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Zitadel up to 3.4.9/4.14.x. It has been classified as problematic. This affects an unknown code. The manipulation with an unknown input leads to a ldap injection vulnerability. CWE is classifying the issue as CWE-90. The product constructs all or part of an LDAP query using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended LDAP query when it is sent to a downstream component. This is going to have an impact on confidentiality. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-44671 since 05/07/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1505 according to MITRE ATT&CK.

Upgrading to version 3.4.10 or 4.15.0 eliminates this vulnerability. The upgrade is hosted for download at github.com.

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Productinfo

Name

• Zitadel

Version

• 3.4.0
• 3.4.1
• 3.4.2
• 3.4.3
• 3.4.4
• 3.4.5
• 3.4.6
• 3.4.7
• 3.4.8
• 3.4.9
• 4.0
• 4.1
• 4.2
• 4.3
• 4.4
• 4.5
• 4.6
• 4.7
• 4.8
• 4.9
• 4.10
• 4.11
• 4.12
• 4.13
• 4.14

Website

• Product: https://github.com/zitadel/zitadel/

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