CVE-2026-104608

{
  "id": "CVE-2026-104608",
  "sourceIdentifier": "[email protected]",
  "published": "2026-11-03T23:17:24.420",
  "lastModified": "2026-11-03T23:17:24.420",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A remote code execution vulnerability was identified in GitHub Enterprise Server in the Git service (babeld). babeld held references into internal collections while calling into the SSH library, where a re-entrant callback could modify a collection and invalidate those references. An attacker with an account and SSH access to the instance could leverage this use-after-free into a controlled write and run arbitrary commands as babeld, including disclosure of its environment secrets. Exploitation required per-build memory offsets; failed attempts crashed babeld. This affected all releases prior to 3.23 and was fixed in 3.22.3, 3.21.8, 3.20.10, and 3.19.14. This vulnerability was reported via the GitHub Bug Bounty program."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "GitHub",
          "product": "Enterprise Server",
          "defaultStatus": "unknown",
          "versions": [
            {
              "version": "3.19.0",
              "lessThan": "3.19.*",
              "versionType": "semver",
              "status": "affected",
              "changes": [
                {
                  "at": "3.19.14",
                  "status": "unaffected"
                }
              ]
            },
            {
              "version": "3.20.0",
              "lessThan": "3.20.*",
              "versionType": "semver",
              "status": "affected",
              "changes": [
                {
                  "at": "3.20.10",
                  "status": "unaffected"
                }
              ]
            },
            {
              "version": "3.21.0",
              "lessThan": "3.21.*",
              "versionType": "semver",
              "status": "affected",
              "changes": [
                {
                  "at": "3.21.8",
                  "status": "unaffected"
                }
              ]
            },
            {
              "version": "3.22.0",
              "lessThan": "3.22.*",
              "versionType": "semver",
              "status": "affected",
              "changes": [
                {
                  "at": "3.22.3",
                  "status": "unaffected"
                }
              ]
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV40": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
          "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "baseScore": 7.7,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "attackRequirements": "NONE",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnAvailabilityImpact": "HIGH",
          "subConfidentialityImpact": "LOW",
          "subIntegrityImpact": "NONE",
          "subAvailabilityImpact": "NONE",
          "exploitMaturity": "NOT_DEFINED",
          "confidentialityRequirement": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "valueDensity": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        },
        {
          "lang": "en",
          "value": "CWE-1265"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://docs.github.com/en/[email protected]/admin/release-notes#3.19.14",
      "source": "[email protected]"
    },
    {
      "url": "https://docs.github.com/en/[email protected]/admin/release-notes#3.20.10",
      "source": "[email protected]"
    },
    {
      "url": "https://docs.github.com/en/[email protected]/admin/release-notes#3.21.8",
      "source": "[email protected]"
    },
    {
      "url": "https://docs.github.com/en/[email protected]/admin/release-notes#3.22.3",
      "source": "[email protected]"
    }
  ]
}