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CVE-2026-47426

OpenAM OAuth Client Impersonation via JWKS Resolver Cache

CVSS 4.0 7.6 HIGHCheck source for fixed versionsKEV status unknown
Original advisory

cve-program · CVE-2026-47426

Published

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.

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Affected versions, risk and source history

Exploitation and risk

Source status

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cve-program · CVE-2026-47426

Published

OpenAM OAuth Client Impersonation via JWKS Resolver Cache

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.

Source published
15 Sep 2026 09:57:08 UTC
Source modified
17 Sep 2026 14:11:08 UTC
Saved here
23 Oct 2026 15:48:27 UTC
Source terms
CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 4.0 · 7.6 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

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Sources read 13 Nov 08:15 UTC · 274 of 275 readable · 272 fully read · documentation 469/469 current

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