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EUVD-2026-319037

2026-10-06T20:07:39.152501+00:00

EUVD-2026-319037

fkie_cve-2026-44671

2026-10-06T20:07:39.152540+00:00

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.

GHSA-rxvx-hhpj-q6px — ZITADEL has LDAP Filter Injection in Login Flow

2026-10-06T20:07:39.152577+00:00

Affected: Go: github.com/zitadel/zitadel

## Summary

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.

## Impact

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.

Note that an authentication bypass is not possible.

## Affected Versions

Systems integrating LDAP as IdPs and running one of the following versions are affected:

- **4.x**: `4.0.0` through `4.14.0` (including RC versions) - **3.x**: `3.1.0` through `3.4.9` - **2.x**: `2.71.11` through `2.71.19`

## Patches

The vulnerability has been addressed in the latest releases. The patch resolves the issue by requiring the correct permission in case the verification flag is provided and only allows self-management of the email address, resp. phone number itself.

- **4.x**: Upgrade to >=[4.15.0](https://github.com/zitadel/zitadel/releases/tag/v4.15.0) - **3.x**: Update to >=[3.4.10](https://github.com/zitadel/zitadel/releases/tag/v3.4.10) - **2.x**: Update to >=[3.4.10](https://github.com/zitadel/zitadel/releases/tag/v3.4.10…