CVE-2026-56668
HIGHCVSS v3.1: 8.1
Source data as of:
At a glance
- Severity
- HIGH
- CVSS
- 8.1 v3.1 · NVD
- EPSS
- EPSS not provided by FIRST.org for this CVE
- CISA KEV
- No
- Type
- Missing Authorization · NVD CWE
- Attack conditions (CVSS vector)
- NetworkNo user interaction · Source: NVD Vector
- Published
- 2026-07-10 · Modified: 2026-07-10
- References
- Jump to references (3)
CVSS / EPSS / KEV
Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources
Description
ZITADEL is an open source identity management platform. Prior to 4.15.3, ZITADEL's OAuth2 Token Exchange endpoint for urn:ietf:params:oauth:grant-type:token-exchange does not verify that the subject token belongs to the requesting client or that requested scopes remain within the original token's scopes, allowing a low-privilege token to be exchanged for elevated permissions at another application. This issue is fixed in version 4.15.3.
References
Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.