Open Access Management (OpenAM) is an access management solution. Prior to 16.1.1, the private_key_jwt client authentication path uses ClientJwksResolverCache without reliably binding a cached jwks_uri resolver and verified assertion to the expected clientID in ClientCredentialsReader. An attacker controlling any registered client with published keys, including one obtained through open dynamic registration when enabled, can authenticate as another client whose keys are exposed through jwks_uri and mint tokens in that client's name across realms in the same OpenAM process. This issue is fixed in version 16.1.1.
History

Thu, 17 Sep 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 15 Sep 2026 13:00:00 +0000

Type Values Removed Values Added
First Time appeared Openidentityplatform
Openidentityplatform openam
Vendors & Products Openidentityplatform
Openidentityplatform openam

Tue, 15 Sep 2026 10:15:00 +0000

Type Values Removed Values Added
Description Open Access Management (OpenAM) is an access management solution. Prior to 16.1.1, the private_key_jwt client authentication path uses ClientJwksResolverCache without reliably binding a cached jwks_uri resolver and verified assertion to the expected clientID in ClientCredentialsReader. An attacker controlling any registered client with published keys, including one obtained through open dynamic registration when enabled, can authenticate as another client whose keys are exposed through jwks_uri and mint tokens in that client's name across realms in the same OpenAM process. This issue is fixed in version 16.1.1.
Title OpenAM OAuth Client Impersonation via JWKS Resolver Cache
Weaknesses CWE-287
References
Metrics cvssV4_0

{'score': 7.6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-09-15T09:57:08.689Z

Updated: 2026-09-17T14:11:08.346Z

Reserved: 2026-05-19T19:37:43.527Z

Link: CVE-2026-47426

cve-icon Vulnrichment

Updated: 2026-09-17T14:11:01.875Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-15T10:17:05.230

Modified: 2026-09-23T18:19:19.803

Link: CVE-2026-47426

cve-icon Redhat

No data.