Auth bypass in Zitadel
CVE-2026-119129
ZITADEL 3.0.0 through 3.4.15 and 4.0.0 before 4.19.5 contains a missing authorization vulnerability in Login V2 that allows attackers to approve OAuth 2.0 device authorizations using a victim's existing session without consent. Attackers can send a signed-in user a link carrying the attacker's user code to obtain the victim's tokens, and can bypass project access settings via the OIDC device authorization API.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/zitadel/zitadel/security/advisories/GHSA-qj3q-235g-qr6w (vendor-advisory)
- www.vulncheck.com/advisories/zitadel-3.0.0-through-3.4.15-and-4.0.0-before-4.19… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-119129?
- CVE-2026-119129 is a high-severity vulnerability in Zitadel, classified under Missing Authorization. CVSS score: 8.1/10. Published 2026-10-29.
- How severe is CVE-2026-119129?
- High severity. CVSS v3 base score is 8.1 out of 10.