CVE-2026-109373 (GCVE-0-2026-109373)
Vulnerability from cvelistv5
Published
2026-10-12 16:05
Modified
2026-10-13 16:53
Severity ?
9.2 (Critical) - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-441 - Unintended Proxy or Intermediary ('Confused Deputy')
Summary
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.
References
Impacted products
Vendor Product Version
zitadel zitadel Version: 3.0.0   ≤
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