EUVD-2026-113195

ZITADEL 4.0.0 before 4.19.5 contains an authentication bypass vulnerability in the Login V2 UI that allows unauthenticated attackers to set the first credential of users lacking any authentication method. Attackers can compute a valid verificationCheck cookie from the user ID and browser...

CVE-2026-119128 ZITADEL 4.0.0 before 4.19.5 Login V2 Account Takeover via Forgeable verificationCheck Cookie

ZITADEL 4.0.0 before 4.19.5 contains an authentication bypass vulnerability in the Login V2 UI that allows unauthenticated attackers to set the first credential of users lacking any authentication method. Attackers can compute a valid verificationCheck cookie from the user ID and browser...

CVE-2026-119128

ZITADEL versions 4.0.0 before 4.19.5 are susceptible to an authentication bypass vulnerability in the Login V2 UI . The root cause is the ability for unauthenticated attackers to compute a valid verificationCheck cookie using only the user ID and browser fingerprint. This flaw allows attackers to...

CVE-2026-119127 ZITADEL 4.0.0 before 4.19.5 Account Takeover via Login V2 Host Header Injection

ZITADEL 4.0.0 before 4.19.5 contains a host header injection vulnerability in the Login V2 UI that allows unauthenticated attackers to poison password-reset, invite, and email-verification links by supplying untrusted x-zitadel-public-host, x-zitadel-forward-host, or x-forwarded-host headers...

CVE-2026-119127

ZITADEL versions 4.0.0 before 4.19.5 are vulnerable to a host header injection in the Login V2 UI. By supplying untrusted headers such as x-zitadel-public-host, x-zitadel-forward-host, or x-forwarded-host, unauthenticated attackers can poison password-reset, invite, and email-verification links. ...

EUVD-2026-113194

ZITADEL 4.0.0 before 4.19.5 contains a host header injection vulnerability in the Login V2 UI that allows unauthenticated attackers to poison password-reset, invite, and email-verification links by supplying untrusted x-zitadel-public-host, x-zitadel-forward-host, or x-forwarded-host headers...

PT-2026-132359

Name of the Vulnerable Software and Affected Versions ZITADEL versions 4.0.0 through 4.19.4 Description An authentication bypass exists in the Login V2 UI that allows unauthenticated attackers to take over accounts of users who have not yet configured any authentication method. By computing a val...

CVE-2026-109373

ZITADEL 3.0.0 before 4.19.2 contains an authentication bypass vulnerability in the Login V2 UI that allows unauthenticated attackers to obtain other users' session tokens by forging unsigned session cookies. Attackers can guess time-ordered session IDs around a victim's sign-in and supply them wi...

CVE-2026-109373 ZITADEL 3.0.0 before 4.19.2 Account Takeover via Unsigned Login V2 Session Cookie

ZITADEL 3.0.0 before 4.19.2 contains an authentication bypass vulnerability in the Login V2 UI that allows unauthenticated attackers to obtain other users' session tokens by forging unsigned session cookies. Attackers can guess time-ordered session IDs around a victim's sign-in and supply them wi...

CVE-2026-109373 ZITADEL 3.0.0 before 4.19.2 Account Takeover via Unsigned Login V2 Session Cookie

ZITADEL 3.0.0 before 4.19.2 contains an authentication bypass vulnerability in the Login V2 UI that allows unauthenticated attackers to obtain other users' session tokens by forging unsigned session cookies. Attackers can guess time-ordered session IDs around a victim's sign-in and supply them wi...

EUVD-2026-97671

ZITADEL 3.0.0 before 4.19.2 contains an authentication bypass vulnerability in the Login V2 UI that allows unauthenticated attackers to obtain other users' session tokens by forging unsigned session cookies. Attackers can guess time-ordered session IDs around a victim's sign-in and supply them wi...

CVE-2026-109373

ZITADEL versions 3.0.0 before 4.19.2 are vulnerable to an authentication bypass in the Login V2 UI . The root cause allows unauthenticated attackers to forge unsigned session cookies by guessing time-ordered session IDs near a victim's sign-in. By supplying these IDs with empty tokens, attackers ...

CVE-2026-109373

ZITADEL 3.0.0 before 4.19.2 contains an authentication bypass vulnerability in the Login V2 UI that allows unauthenticated attackers to obtain other users' session tokens by forging unsigned session cookies. Attackers can guess time-ordered session IDs around a victim's sign-in and supply them wi...

PT-2026-110786

Name of the Vulnerable Software and Affected Versions ZITADEL versions 3.0.0 through 4.19.1 Description An authentication bypass exists in the Login V2 UI. Unauthenticated attackers can obtain session tokens of other users by forging unsigned session cookies. By guessing time-ordered session IDs...

CVE-2026-109373: Unintended Proxy or Intermediary

ZITADEL 3.0.0 before 4.19.2 contains an authentication bypass vulnerability in the Login V2 UI that allows unauthenticated attackers to obtain other users' session tokens by forging unsigned session cookies. Attackers can guess time-ordered session IDs around a victim's sign-in and supply them wi...

CVE-2026-29193

ZITADEL is an open source identity management platform. From version 4.0.0 to 4.12.0, a vulnerability in Zitadel's login V2 UI allowed users to bypass login behavior and security policies and self-register new accounts or sign in using password even if corresponding options were disabled in their...

CVE-2026-29193: Improper Authentication

ZITADEL is an open source identity management platform. From version 4.0.0 to 4.12.0, a vulnerability in Zitadel's login V2 UI allowed users to bypass login behavior and security policies and self-register new accounts or sign in using password even if corresponding options were disabled in their...