CVE-2026-7776

{
  "id": "CVE-2026-7776",
  "sourceIdentifier": "[email protected]",
  "published": "2026-05-04T22:16:20.330",
  "lastModified": "2026-10-26T19:10:00.163",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Boundary Community Edition and Boundary Enterprise (“Boundary”) workers are vulnerable to a denial-of-service condition during node enrollment TLS handshakes. An attacker with network access to the worker authentication listener may open a connection and delay or withhold the client certificate during the TLS handshake, causing worker connection handling to block. This may prevent legitimate worker connections from being accepted or routed. This vulnerability, CVE-2026-7776, is fixed in Boundary 0.21.3, 0.20.3, 0.19.5."
    },
    {
      "lang": "es",
      "value": "Los workers de Boundary Community Edition y Boundary Enterprise (’Boundary’) son vulnerables a una condición de denegación de servicio durante los handshakes TLS de registro de nodos. Un atacante con acceso de red al listener de autenticación del worker puede abrir una conexión y retrasar o retener el certificado del cliente durante el handshake TLS, lo que provoca que el manejo de conexiones del worker se bloquee. Esto puede impedir que las conexiones legítimas del worker sean aceptadas o enrutadas. Esta vulnerabilidad, CVE-2026-7776, está corregida en Boundary 0.21.3, 0.20.3, 0.19.5."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "HashiCorp",
          "product": "Boundary",
          "defaultStatus": "unaffected",
          "platforms": [
            "64 bit",
            "32 bit",
            "x86",
            "ARM",
            "MacOS",
            "Windows",
            "Linux"
          ],
          "repo": "https://github.com/hashicorp/boundary",
          "versions": [
            {
              "version": "0.9.0",
              "lessThan": "0.21.3",
              "versionType": "semver",
              "status": "affected",
              "changes": [
                {
                  "at": "0.19.5",
                  "status": "unaffected"
                },
                {
                  "at": "0.20.3",
                  "status": "unaffected"
                },
                {
                  "at": "0.21.3",
                  "status": "unaffected"
                }
              ]
            }
          ]
        },
        {
          "vendor": "HashiCorp",
          "product": "Boundary Enterprise",
          "defaultStatus": "unaffected",
          "platforms": [
            "64 bit",
            "32 bit",
            "x86",
            "ARM",
            "MacOS",
            "Windows",
            "Linux"
          ],
          "repo": "https://github.com/hashicorp/boundary",
          "versions": [
            {
              "version": "0.9.0",
              "lessThan": "0.21.3",
              "versionType": "semver",
              "status": "affected",
              "changes": [
                {
                  "at": "0.19.5",
                  "status": "unaffected"
                },
                {
                  "at": "0.20.3",
                  "status": "unaffected"
                },
                {
                  "at": "0.21.3",
                  "status": "unaffected"
                }
              ]
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-05-05T13:20:57.356797Z",
          "id": "CVE-2026-7776",
          "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-770"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://discuss.hashicorp.com/t/hcsec-2026-11-boundary-workers-vulnerable-to-denial-of-service-during-tls-handshake",
      "source": "[email protected]"
    }
  ]
}