CVE-2026-22734 (GCVE-0-2026-22734)

Vulnerability from cvelistv5 – Published: 2026-04-16 23:33 – Updated: 2026-04-17 13:21
VLAI
Title
Cloud Foundry UAA SAML 2.0 Signature Bypass
Summary
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).
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-17 13:20 UTC
CWE
  • CWE-290 - Authentication bypass by spoofing
Assigner
vmware CNA under the mitre root
CNA scorecard C 64/100 over 233 records in the last 180 days details
Impacted products
Vendor Product Version CPE status
Cloud Foundry UUA Affected: v77.21.0 , ≤ v78.8.0 (custom)
guessed Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-22734",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-17T13:20:57.232084Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-17T13:21:04.331Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "UUA",
          "vendor": "Cloud Foundry",
          "versions": [
            {
              "lessThanOrEqual": "v78.8.0",
              "status": "affected",
              "version": "v77.21.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Cloud Foundry UUA is\u003cspan\u003e\u0026nbsp;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.\u0026nbsp;\u003c/span\u003e\u003cspan\u003eThis issue affects UUA\u003c/span\u003e\u003cspan\u003e\u0026nbsp;from v77.30.0 to v78.7.0 (inclusive)\u0026nbsp;\u003c/span\u003e\u003cspan\u003eand it affects\u0026nbsp;\u003c/span\u003e\u003cspan\u003eCF Deployment\u0026nbsp;\u003c/span\u003e\u003cspan\u003efrom v48.7.0 to v54.14.0 (inclusive).\u003c/span\u003e"
            }
          ],
          "value": "Cloud Foundry UUA is\u00a0vulnerable 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.\u00a0This issue affects UUA\u00a0from v77.30.0 to v78.7.0 (inclusive)\u00a0and it affects\u00a0CF Deployment\u00a0from v48.7.0 to v54.14.0 (inclusive)."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-646",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-646 Peripheral Footprinting"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-290",
              "description": "CWE-290 Authentication bypass by spoofing",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-16T23:33:43.596Z",
        "orgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d",
        "shortName": "vmware"
      },
      "references": [
        {
          "url": "https://www.cloudfoundry.org/blog/cve-2026-22734-uaa-saml-2-0-signature-bypass/"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Cloud Foundry UAA SAML 2.0 Signature Bypass",
      "x_generator": {
        "engine": "Vulnogram 1.0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d",
    "assignerShortName": "vmware",
    "cveId": "CVE-2026-22734",
    "datePublished": "2026-04-16T23:33:43.596Z",
    "dateReserved": "2026-01-09T06:54:41.498Z",
    "dateUpdated": "2026-04-17T13:21:04.331Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-22734",
      "date": "2026-10-30",
      "epss": "0.00364",
      "percentile": "0.30205"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "UUA",
                "vendor": "Cloud Foundry",
                "versions": [
                  {
                    "lessThanOrEqual": "v78.8.0",
                    "status": "affected",
                    "version": "v77.21.0",
                    "versionType": "custom"
                  }
                ]
              }
            ],
            "source": "security@vmware.com"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Cloud Foundry UUA is\u00a0vulnerable 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.\u00a0This issue affects UUA\u00a0from v77.30.0 to v78.7.0 (inclusive)\u00a0and it affects\u00a0CF Deployment\u00a0from 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 est\u00e1n habilitadas para un cliente, ya que el UAA acepta aserciones de portador SAML 2.0 que no est\u00e1n 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)."
          }
        ],
        "id": "CVE-2026-22734",
        "lastModified": "2026-10-26T00:10:00.150",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 8.6,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "CHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 4.0,
              "source": "security@vmware.com",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2026-22734",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "yes"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-17T13:20:57.232084Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2026-04-17T01:17:37.107",
        "references": [
          {
            "source": "security@vmware.com",
            "url": "https://www.cloudfoundry.org/blog/cve-2026-22734-uaa-saml-2-0-signature-bypass/"
          }
        ],
        "sourceIdentifier": "security@vmware.com",
        "vulnStatus": "Awaiting Analysis",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-290"
              }
            ],
            "source": "security@vmware.com",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "current_release_date": "2026-06-05T19:14:23+00:00",
      "cve": "CVE-2026-22734",
      "id": "CVE-2026-22734",
      "initial_release_date": "2026-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Cloud Foundry UAA SAML 2.0 Signature Bypass",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-22734.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-22734",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "yes"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-04-17T13:20:57.232084Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-04-17T13:21:00.297Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "UUA",
              "vendor": "Cloud Foundry",
              "versions": [
                {
                  "lessThanOrEqual": "v78.8.0",
                  "status": "affected",
                  "version": "v77.21.0",
                  "versionType": "custom"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "Cloud Foundry UUA is\u003cspan\u003e\u0026nbsp;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.\u0026nbsp;\u003c/span\u003e\u003cspan\u003eThis issue affects UUA\u003c/span\u003e\u003cspan\u003e\u0026nbsp;from v77.30.0 to v78.7.0 (inclusive)\u0026nbsp;\u003c/span\u003e\u003cspan\u003eand it affects\u0026nbsp;\u003c/span\u003e\u003cspan\u003eCF Deployment\u0026nbsp;\u003c/span\u003e\u003cspan\u003efrom v48.7.0 to v54.14.0 (inclusive).\u003c/span\u003e"
                }
              ],
              "value": "Cloud Foundry UUA is\u00a0vulnerable 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.\u00a0This issue affects UUA\u00a0from v77.30.0 to v78.7.0 (inclusive)\u00a0and it affects\u00a0CF Deployment\u00a0from v48.7.0 to v54.14.0 (inclusive)."
            }
          ],
          "impacts": [
            {
              "capecId": "CAPEC-646",
              "descriptions": [
                {
                  "lang": "en",
                  "value": "CAPEC-646 Peripheral Footprinting"
                }
              ]
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 8.6,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "CHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
                "version": "3.1"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-290",
                  "description": "CWE-290 Authentication bypass by spoofing",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-04-16T23:33:43.596Z",
            "orgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d",
            "shortName": "vmware"
          },
          "references": [
            {
              "url": "https://www.cloudfoundry.org/blog/cve-2026-22734-uaa-saml-2-0-signature-bypass/"
            }
          ],
          "source": {
            "discovery": "UNKNOWN"
          },
          "title": "Cloud Foundry UAA SAML 2.0 Signature Bypass",
          "x_generator": {
            "engine": "Vulnogram 1.0.1"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d",
        "assignerShortName": "vmware",
        "cveId": "CVE-2026-22734",
        "datePublished": "2026-04-16T23:33:43.596Z",
        "dateReserved": "2026-01-09T06:54:41.498Z",
        "dateUpdated": "2026-04-16T23:33:43.596Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Events included in the timeline

Loading timeline…


    Loading…

    Loading…

    Loading…

    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.