VULNERABILITY INTELLIGENCE

CVE-2026-56668

CVSS score8.1 HIGH
EPSS probability0.41%
CISA KEVNot currently listed
Published2026-07-10
Last modified2026-07-14
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

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.

Weakness classification

  • security-advisories@github.com: CWE-862

Primary references