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CVE-2026-59851

🗓️ 21 Jul 2026 14:20:47Reported by redhatType 
cve
 cve
🔗 web.nvd.nist.gov👁 73 Views🌐 WEB

Libssh authentication bypass due to missing Kerberos principal check in gssapi key exchange.

Related
Detection
Affected
Refs
Paths
NVD
Vulners
[
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 10",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "libssh",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:0.12.0-3.el10_2",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:10.2"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Hardened Images",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "packageName": "libssh-main",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0.12.1-4.hum1",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/a:redhat:hummingbird:1"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "libssh",
    "defaultStatus": "unaffected",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:8"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "libssh",
    "defaultStatus": "unaffected",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:9"
    ]
  }
]
ParameterPositionPathDescriptionCWE
usernamepathserver.example.com:2222libssh gssapi-keyex authorization bypass allows authenticating as arbitrary local users when GSSAPI key exchange is enabled (CVE-2026-59851).CWE-863

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17 Aug 2026 22:17Current
7.6High risk
Vulners AI Score7.6
CVSS 3.18.8
EPSS0.00489
SSVC
73