CVE-2026-109374CWE-863broken-access-control

CVE-2026-109374

Medium · published October 12, 2026

CVSS v3.1
5.5
EPSS
0%
Percentile
10.6
In the wild
Unconfirmed
What it is

ZITADEL 3.0.0 before 4.19.2 contains a privilege escalation vulnerability in OIDC token exchange that allows end-user impersonators to impersonate administrators including IAM_OWNER by bypassing the admin.impersonation check. Attackers holding IAM_END_USER_IMPERSONATOR or ORG_END_USER_IMPERSONATOR roles can sign in to relying applications as administrators with their roles and claims.

The record
Technical detail
CVSS v3.1
5.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
CVSS v4.0
5.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
EPSS
0.00209 · 10.6th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2026-10-12T21:17Z
References (2)
https://github.com/zitadel/zitadel/security/advisories/GHSA-w4gv-rcwj-w6r5 · [email protected]https://www.vulncheck.com/advisories/zitadel-3.0.0-before-4.19.2-privilege-escalation-via-oidc-token-exchange-impersonation · [email protected]
EPSS history
Timeline
  • 14 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 12 OCT 16:05Z
    ZITADEL 3.0.0 before 4.19.2 Privilege Escalation via OIDC Token Exchange Impersonation
    cvelistv5
  • 12 OCT 16:05Z
    ZITADEL 3.0.0 before 4.19.2 Privilege Escalation via OIDC Token Exchange Impersonation
    cvelistv5