CVE-2021-22862

{
  "id": "CVE-2021-22862",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:P/I:N/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "product-cna@github.com",
      "affectedData": [
        {
          "vendor": "GitHub",
          "product": "GitHub Enterprise Server",
          "versions": [
            {
              "status": "affected",
              "version": "3.0",
              "lessThan": "3.0.1",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-03-03T04:15:13.163",
  "references": [
    {
      "url": "https://docs.github.com/en/enterprise-server%403.0/admin/release-notes#3.0.1",
      "source": "product-cna@github.com"
    },
    {
      "url": "https://docs.github.com/en/enterprise-server%403.0/admin/release-notes#3.0.1",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "product-cna@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-285"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An improper access control vulnerability was identified in GitHub Enterprise Server that allowed an authenticated user with the ability to fork a repository to disclose Actions secrets for the parent repository of the fork. This vulnerability existed due to a flaw that allowed the base reference of a pull request to be updated to point to an arbitrary SHA or another pull request outside of the fork repository. By establishing this incorrect reference in a PR, the restrictions that limit the Actions secrets sent a workflow from forks could be bypassed. This vulnerability affected GitHub Enterprise Server version 3.0.0, 3.0.0.rc2, and 3.0.0.rc1. This vulnerability was reported via the GitHub Bug Bounty program."
    },
    {
      "lang": "es",
      "value": "Se identificó una vulnerabilidad de control de acceso inadecuada en GitHub Enterprise Server que permitía a un usuario autenticado con la capacidad de bifurcar un repositorio revelar los secretos de las acciones para el repositorio padre de la bifurcación. Esta vulnerabilidad existía debido a un fallo que permitía actualizar la referencia base de un pull request para que apuntara a un SHA arbitrario o a otro pull request fuera del repositorio fork. Al establecer esta referencia incorrecta en un PR, las restricciones que limitan las Acciones secretas enviadas a un flujo de trabajo desde los forks podían ser eludidas. Esta vulnerabilidad afectaba a las versiones 3.0.0, 3.0.0.rc2 y 3.0.0.rc1 de GitHub Enterprise Server. Esta vulnerabilidad fue reportada a través del programa GitHub Bug Bounty"
    }
  ],
  "lastModified": "2026-06-17T03:37:54.070",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:github:github:3.0.0:-:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "61ABB5BF-C578-403B-8EF9-A28274F486FF"
            },
            {
              "criteria": "cpe:2.3:a:github:github:3.0.0:rc1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "634A0A6C-0F17-4DE2-B2D1-C3B0C5C8EDD6"
            },
            {
              "criteria": "cpe:2.3:a:github:github:3.0.0:rc2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0FA74C51-5AB4-4B23-B24B-5629736B17E1"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "product-cna@github.com"
}