CVE-2026-109373

HighCVSS 8.1/10Last modified Oct 13, 2026

Description

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 with empty tokens to receive rotated tokens, taking over accounts including MFA-completed administrator sessions.

Metrics

CVSS 3.1 8.1/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-441

Affected software

No affected versions have been published.

Timeline

Published: Oct 12, 2026
Last modified: Oct 13, 2026
NVD status: Deferred

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