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CVE-2026-47426 (GCVE-0-2026-47426)

Vulnerability from cvelistv5 – Published: 2026-09-15 09:57 – Updated: 2026-09-15 09:57
VLAI
Title
OpenAM OAuth Client Impersonation via JWKS Resolver Cache
Summary
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.
Severity
7.6 (High)
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
CWE
  • CWE-287 - Improper Authentication
Assigner
References
Impacted products
Vendor Product Version CPE status
OpenIdentityPlatform OpenAM Affected: < 16.1.1
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{
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      "affected": [
        {
          "product": "OpenAM",
          "vendor": "OpenIdentityPlatform",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 16.1.1"
            }
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          "value": "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\u0027s name across realms in the same OpenAM process. This issue is fixed in version 16.1.1."
        }
      ],
      "metrics": [
        {
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            "attackRequirements": "PRESENT",
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            "baseScore": 7.6,
            "baseSeverity": "HIGH",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-287",
              "description": "CWE-287: Improper Authentication",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-15T09:57:08.689Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
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          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-f2cx-463q-7m2c"
        },
        {
          "name": "https://github.com/OpenIdentityPlatform/OpenAM/commit/91acaf499162097ec83bcd729275ba7a12e1bd21",
          "tags": [
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          ],
          "url": "https://github.com/OpenIdentityPlatform/OpenAM/commit/91acaf499162097ec83bcd729275ba7a12e1bd21"
        },
        {
          "name": "https://github.com/OpenIdentityPlatform/OpenAM/releases/tag/16.1.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/OpenIdentityPlatform/OpenAM/releases/tag/16.1.1"
        }
      ],
      "source": {
        "advisory": "GHSA-f2cx-463q-7m2c",
        "discovery": "UNKNOWN"
      },
      "title": "OpenAM OAuth Client Impersonation via JWKS Resolver Cache"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-47426",
    "datePublished": "2026-09-15T09:57:08.689Z",
    "dateReserved": "2026-05-19T19:37:43.527Z",
    "dateUpdated": "2026-09-15T09:57:08.689Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "percentile": "0.44658"
    },
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  }
}



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