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CVE-2026-1999 Incorrect Authorization vulnerability was identified in GitHub Enterprise Server that allowed unauthorized merging of pull requests

🗓️ 18 Feb 2026 20:44:51Reported by GitHub_PType 
cvelist
 cvelist
🔗 www.cve.org👁 22 Views

CVE-2026-1999 allows merge bypass for forked pull requests without branch protection.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-1999
18 Feb 202620:44
attackerkb
CNNVD
GitHub Enterprise Server 安全漏洞
18 Feb 202600:00
cnnvd
CVE
CVE-2026-1999
18 Feb 202620:44
cve
NCSC
Vulnerabilities fixed in GitHub Enterprise Server
20 Feb 202610:13
ncsc
NVD
CVE-2026-1999
18 Feb 202621:16
nvd
OSV
CVE-2026-1999
18 Feb 202621:16
osv
Positive Technologies
PT-2026-20504
18 Feb 202600:00
ptsecurity
RedhatCVE
CVE-2026-1999
20 Feb 202601:22
redhatcve
Vulnrichment
CVE-2026-1999 Incorrect Authorization vulnerability was identified in GitHub Enterprise Server that allowed unauthorized merging of pull requests
18 Feb 202620:44
vulnrichment
[
  {
    "vendor": "GitHub",
    "product": "Enterprise Server",
    "versions": [
      {
        "status": "affected",
        "version": "3.17.0",
        "lessThan": "3.17.11",
        "changes": [
          {
            "at": "3.17.11",
            "status": "unaffected"
          }
        ],
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "3.18.0",
        "lessThan": "3.18.5",
        "changes": [
          {
            "at": "3.18.5",
            "status": "unaffected"
          }
        ],
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "3.19.0",
        "lessThan": "3.19.2",
        "changes": [
          {
            "at": "3.19.2",
            "status": "unaffected"
          }
        ],
        "versionType": "semver"
      }
    ],
    "defaultStatus": "affected"
  }
]

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