CVE-2026-55669 json
ZITADEL: Missing Token Audience Validation (`aud`) in JWT IdP Provider
published 4mo ago modified 4mo ago also EUVD-2026-42958 , GHSA-g5h5-m4hm-xjrr , GO-2026-5391
- cvss
- 4.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 4%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- go github.com/zitadel/zitadel 1.80.0-v2.20.0.20260615132747-d184e976fc79
- zitadel zitadel 3.4.12, 4.15.2
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
Is CVE-2026-55669 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4mo ago
Exploit prediction
0.16% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.2 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N |
| GitHub | 3.1 | 4.2 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/zitadel/zitadel | <1.80.0-v2.20.0.20260615132747-d184e976fc79 |
1.80.0-v2.20.0.20260615132747-d184e976fc79 |
Affected products
- zitadel zitadel
Classification
- Weakness
-
- CWE-346 Origin Validation Error
References
-
github.com
/zitadel/zitadel/commit/d184e976fc799a383bb6ef9f32c3bae11a3ef85f
web, patch
-
github.com
/zitadel/zitadel/security/advisories/GHSA-g5h5-m4hm-xjrr
web, advisory
-
github.com
/zitadel/zitadel/releases/tag/v3.4.12
web
-
github.com
/zitadel/zitadel/releases/tag/v4.15.2
web
-
github.com
/zitadel/zitadel
package
Sources
- CVE List CVE-2026-55669
- GitHub Advisory GHSA-g5h5-m4hm-xjrr
- NVD CVE-2026-55669
- OSV GO-2026-5391
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.