https://cve.radiocsirt.org/rss/recent/all/10 Most recent entries from all 2026-10-07T00:47:54.868318+00:00 Vulnerability-Lookup csirt@opendfir.org python-feedgen Contains only the most 10 recent entries. https://cve.radiocsirt.org/vuln/euvd-2026-0033 EUVD-2026-0033 2026-10-07T00:47:54.916570+00:00 EUVD-2026-0033 https://cve.radiocsirt.org/vuln/fkie_cve-2024-41952 fkie_cve-2024-41952 2026-10-07T00:47:54.916608+00:00

Zitadel is an open source identity management system. ZITADEL administrators can enable a setting called "Ignoring unknown usernames" which helps mitigate attacks that try to guess/enumerate usernames. If enabled, ZITADEL will show the password prompt even if the user doesn't exist and report "Username or Password invalid". Due to a implementation change to prevent deadlocks calling the database, the flag would not be correctly respected in all cases and an attacker would gain information if an account exist within ZITADEL, since the error message shows "object not found" instead of the generic error message. This vulnerability is fixed in 2.58.1, 2.57.1, 2.56.2, 2.55.5, 2.54.8, and 2.53.9.

 https://cve.radiocsirt.org/vuln/ghsa-567v-6hmg-6qg7 GHSA-567v-6hmg-6qg7 — ZITADEL "ignoring unknown usernames" vulnerability 2026-10-07T00:47:54.916647+00:00

Affected: Go: github.com/zitadel/zitadel

### Impact

ZITADEL administrators can enable a setting called "Ignoring unknown usernames" which helps mitigate attacks that try to guess/enumerate usernames. If enabled, ZITADEL will show the password prompt even if the user doesn't exist and report "Username or Password invalid". Due to a implementation change to prevent deadlocks calling the database, the flag would not be correctly respected in all cases and an attacker would gain information if an account exist within ZITADEL, since the error message shows "object not found" instead of the generic error message.

### Patches

2.x versions are fixed on >= [2.58.1](https://github.com/zitadel/zitadel/releases/tag/v2.58.1) 2.57.x versions are fixed on >= [2.57.1](https://github.com/zitadel/zitadel/releases/tag/v2.57.1) 2.56.x versions are fixed on >= [2.56.2](https://github.com/zitadel/zitadel/releases/tag/v2.56.2) 2.55.x versions are fixed on >= [2.55.5](https://github.com/zitadel/zitadel/releases/tag/v2.55.5) 2.54.x versions are fixed on >= [2.54.8](https://github.com/zitadel/zitadel/releases/tag/v2.54.8) 2.53.x versions are fixed on >= [2.53.9](https://github.com/zitadel/zitadel/releases/tag/v2.53.9)

ZITADEL recommends upgrading to the latest versions available in due course.

### Workarounds

There is no workaround since a patch is already available.

### Questions

If you have any questions or comments about this advisory, please email us at [security@zitadel.com](mailto:security@zitadel.com)