ZITADEL: Missing Token Audience Validation (`aud`) in JWT IdP Provider

Description

ZITADEL is an open source identity management platform. Prior to 3.4.12 and 4.15.2, ZITADEL's external JWT Identity Provider validates a token's signature and issuer (iss) but not the audience (aud) claim, allowing a validly signed token from a trusted issuer for another relying party to be accepted by ZITADEL. This issue is fixed in versions 3.4.12 and 4.15.2.

Scores

EPSS (exploitation in 30 days)

0.15% · top 95% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.2.

Weakness

• CWE-346: Origin Validation Error (opens in a new tab)All about CWE-346 and its CVEs

Affected products

• zitadel · zitadel

  • affected >= 4.0.0-rc.1, < 4.15.2
  • affected < 3.4.12

Affected packages

From reviewed advisories of the GitHub Advisory Database.

• Gogithub.com/zitadel/zitadelGHSA-g5h5-m4hm-xjrr (opens in a new tab)

References (3)

• https://github.com/zitadel/zitadel/security/advisories/GHSA-g5h5-m4hm-xjrr (opens in a new tab)x_refsource_CONFIRM
• https://github.com/zitadel/zitadel/releases/tag/v3.4.12 (opens in a new tab)x_refsource_MISC
• https://github.com/zitadel/zitadel/releases/tag/v4.15.2 (opens in a new tab)x_refsource_MISC

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisory GHSA-g5h5-m4hm-xjrr (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-55669](https://trackcve.app/badge/CVE-2026-55669.svg)](https://trackcve.app/cve/CVE-2026-55669)

Record last updated 10 Jul 2026, 18:16 UTC.