Vulnerability · Published Jul 10, 2026 · Assigned by GitHub_M

CVE-2026-55669ZITADEL: Missing Token Audience Validation (`aud`) in JWT IdP Provider

Medium 4.2

In plain English

A medium-severity security flaw in zitadel from zitadel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 5% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.2Medium

Exploit odds (30 days)0.2%top 95.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/zitadel/zitadel	1.80.0-v2.20.0.20260615132747-d184e976fc79	GHSA-g5h5-m4hm-xjrr
Go	github.com/zitadel/zitadel	1.80.0-v2.20.0.20260615132747-d184e976fc79	GO-2026-5391

Affected products (as reported)

Vendor	Product	Versions
zitadel	zitadel	>= 4.0.0-rc.1, < 4.15.2< 3.4.12

Weakness: CWE-346 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

References

https://github.com/zitadel/zitadel/security/advisories/GHSA-g5h5-m4hm-xjrr x_refsource_CONFIRM
https://github.com/zitadel/zitadel/releases/tag/v3.4.12 x_refsource_MISC
https://github.com/zitadel/zitadel/releases/tag/v4.15.2 x_refsource_MISC