CVE-2026-22734

{
  "id": "CVE-2026-22734",
  "sourceIdentifier": "[email protected]",
  "published": "2026-04-17T01:17:37.107",
  "lastModified": "2026-10-26T00:10:00.150",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Cloud Foundry UUA is vulnerable to a bypass that allows an attacker to obtain a token for any user and gain access to UAA-protected systems. This vulnerability exists when SAML 2.0 bearer assertions are enabled for a client, as the UAA accepts SAML 2.0 bearer assertions that are neither signed nor encrypted. This issue affects UUA from v77.30.0 to v78.7.0 (inclusive) and it affects CF Deployment from v48.7.0 to v54.14.0 (inclusive)."
    },
    {
      "lang": "es",
      "value": "Cloud Foundry UUA es vulnerable a un bypass que permite a un atacante obtener un token para cualquier usuario y obtener acceso a sistemas protegidos por UAA. Esta vulnerabilidad existe cuando las aserciones de portador SAML 2.0 están habilitadas para un cliente, ya que el UAA acepta aserciones de portador SAML 2.0 que no están ni firmadas ni cifradas. Este problema afecta a UUA desde la v77.30.0 hasta la v78.7.0 (inclusive) y afecta a CF Deployment desde la v48.7.0 hasta la v54.14.0 (inclusive)."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Cloud Foundry",
          "product": "UUA",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "v77.21.0",
              "lessThanOrEqual": "v78.8.0",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
          "baseScore": 8.6,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 4.0
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-04-17T13:20:57.232084Z",
          "id": "CVE-2026-22734",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-290"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://www.cloudfoundry.org/blog/cve-2026-22734-uaa-saml-2-0-signature-bypass/",
      "source": "[email protected]"
    }
  ]
}