EUVD-2026-2788

ZITADEL is an open source identity management platform. Prior to 4.9.1 and 3.4.6, a user enumeration vulnerability has been discovered in Zitadel's login interfaces. An unauthenticated attacker can exploit this flaw to confirm the existence of valid user accounts by iterating through usernames an...

CVE-2026-23511

ZITADEL is an open source identity management platform. Prior to 4.9.1 and 3.4.6, a user enumeration vulnerability has been discovered in Zitadel's login interfaces. An unauthenticated attacker can exploit this flaw to confirm the existence of valid user accounts by iterating through usernames an...

CVE-2026-23511

CVE-2026-23511 affects Zitadel, an open source identity management platform. A user enumeration flaw in login interfaces allows an unauthenticated attacker to verify the existence of valid user accounts by iterating through usernames and userIDs. The issue is present in multiple versions prior to...

GHSA-PVM5-9FRX-264R Zitadel has a user enumeration vulnerability in Login UIs

Summary A user enumeration vulnerability has been discovered in Zitadel's login interfaces. An unauthenticated attacker can exploit this flaw to confirm the existence of valid user accounts by iterating through usernames and userIDs. Impact The login UIs in version 1 and 2 provide the possibility...

Zitadel has a user enumeration vulnerability in Login UIs

Summary A user enumeration vulnerability has been discovered in Zitadel's login interfaces. An unauthenticated attacker can exploit this flaw to confirm the existence of valid user accounts by iterating through usernames and userIDs. Impact The login UIs in version 1 and 2 provide the possibility...

CVE-2026-23511: Observable Response Discrepancy

ZITADEL is an open source identity management platform. Prior to 4.9.1 and 3.4.6, a user enumeration vulnerability has been discovered in Zitadel's login interfaces. An unauthenticated attacker can exploit this flaw to confirm the existence of valid user accounts by iterating through usernames an...

ZITADEL security vulnerabilities

ZITADEL is a modern open-source alternative to Auth0, Firebase Auth, AWS Cognito, and Keycloak, developed for the era of containers and serverless environments by ZITADEL in Switzerland. Versions of ZITADEL prior to 4.9.1 and 3.4.6 contain security vulnerabilities. These vulnerabilities stem from...

PT-2026-3095

Name of the Vulnerable Software and Affected Versions ZITADEL versions prior to 4.9.1 ZITADEL versions prior to 3.4.6 Description ZITADEL is an open source identity management platform. A user enumeration issue exists in the login interfaces. An unauthenticated attacker can determine the existenc...

CVE-2024-41952

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...

CVE-2024-39683

ZITADEL is an open-source identity infrastructure tool. ZITADEL provides users the ability to list all user sessions of the current user agent browser. Starting in version 2.53.0 and prior to versions 2.53.8, 2.54.5, and 2.55.1, due to a missing check, user sessions without that information e.g...

The vulnerability of the ZITADEL identification data management software platform, related to deficiencies in authentication procedures, allows attackers to compromise the confidentiality and integrity of the protected information.

The vulnerability of the ZITADEL identification data management software platform is related to deficiencies in the authentication process. Exploiting this vulnerability allows a malicious actor to compromise the confidentiality and integrity of the protected information...

SUSE CVE-2025-67494

ZITADEL is an open-source identity infrastructure tool. Versions 4.7.0 and below are vulnerable to an unauthenticated, full-read SSRF vulnerability. The ZITADEL Login UI V2 treats the x-zitadel-forward-host header as a trusted fallback for all deployments, including self-hosted instances. This...

SUSE CVE-2025-67495

ZITADEL is an open-source identity infrastructure tool. Versions 4.0.0-rc.1 through 4.7.0 are vulnerable to DOM-Based XSS through the Zitadel V2 logout endpoint. The /logout endpoint insecurely routes to a value that is supplied in the postlogoutredirect GET parameter. As a result, unauthenticate...

SUSE CVE-2025-67717

ZITADEL is an open-source identity infrastructure tool. Versions 2.44.0 through 3.4.4 and 4.0.0-rc.1 through 4.7.1 disclose the total number of instance users to authenticated users, regardless of their specific permissions. While this does not leak individual user data or PII, disclosing the tot...

GO-2025-4227 Zitadel Discloses the Total Number of Instance Users in github.com/zitadel/zitadel

Zitadel Discloses the Total Number of Instance Users in github.com/zitadel/zitadel. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. If this is causing false-positive reports from vulnerability scanners,...

GO-2025-4213 ZITADEL Vulnerable to Account Takeover via DOM-Based XSS in Zitadel V2 Login in github.com/zitadel/zitadel

ZITADEL Vulnerable to Account Takeover via DOM-Based XSS in Zitadel V2 Login in github.com/zitadel/zitadel. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. If this is causing false-positive reports from...

GO-2025-4212 ZITADEL Vulnerable to Account Takeover Due to Improper Instance Validation in V2 Login in github.com/zitadel/zitadel

ZITADEL Vulnerable to Account Takeover Due to Improper Instance Validation in V2 Login in github.com/zitadel/zitadel. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. If this is causing false-positive...

GO-2025-4210 ZITADEL Vulnerable to Unauthenticated Full-Read SSRF via V2 Login in github.com/zitadel/zitadel

ZITADEL Vulnerable to Unauthenticated Full-Read SSRF via V2 Login in github.com/zitadel/zitadel. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. If this is causing false-positive reports from vulnerabili...

CVE-2025-67717

ZITADEL is an open-source identity infrastructure tool. Versions 2.44.0 through 3.4.4 and 4.0.0-rc.1 through 4.7.1 disclose the total number of instance users to authenticated users, regardless of their specific permissions. While this does not leak individual user data or PII, disclosing the tot...

CVE-2025-67717

ZITADEL is an open-source identity infrastructure tool. Versions 2.44.0 through 3.4.4 and 4.0.0-rc.1 through 4.7.1 disclose the total number of instance users to authenticated users, regardless of their specific permissions. While this does not leak individual user data or PII, disclosing the tot...