{
  "fix": "RHSA-2026:55855",
  "url": "https://patchblox.com/security/fix/linux/rhsa-2026-55855",
  "summary": "RHSA-2026:55855, released August 18, 2026, fixes 11 CVEs in libssh (version 0.12.0-3.el10_2). None of them is reported as exploited. Patch Radar priority: High.",
  "platform": "linux",
  "type": "advisory",
  "title": "libssh security update",
  "released": "2026-08-18T23:09:46Z",
  "priority": "High",
  "priorityTier": 3,
  "priorityReason": "Closes CVE-2026-59844, high severity",
  "supported": true,
  "cveCount": 11,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.00567,
  "maxCvss": 8.8,
  "vendorAdvisory": "https://access.redhat.com/errata/RHSA-2026:55855",
  "appliesTo": [
    {
      "product": "libssh",
      "productUrl": "https://patchblox.com/security/product/linux/libssh",
      "release": "RHEL 10",
      "fixedVersion": "0.12.0-3.el10_2",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2026-59843",
      "url": "https://patchblox.com/security/cve/CVE-2026-59843",
      "title": "Libssh: libssh: denial of service via zero advertised channel packet size",
      "priority": "High",
      "severity": "Moderate",
      "cvss": 8.8,
      "epss": 0.00567,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-59844",
      "url": "https://patchblox.com/security/cve/CVE-2026-59844",
      "title": "Libssh: libssh: denial of service via oversized sftp read length",
      "priority": "High",
      "severity": "Moderate",
      "cvss": 8.8,
      "epss": 0.00567,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-59842",
      "url": "https://patchblox.com/security/cve/CVE-2026-59842",
      "title": "libssh: A flaw was found in libssh",
      "priority": "High",
      "severity": "medium",
      "cvss": 8.8,
      "epss": 0.00493,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-59851",
      "url": "https://patchblox.com/security/cve/CVE-2026-59851",
      "title": "libssh: A flaw was found in libssh",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00489,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-59849",
      "url": "https://patchblox.com/security/cve/CVE-2026-59849",
      "title": "libssh: A flaw was found in libssh",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00438,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-59850",
      "url": "https://patchblox.com/security/cve/CVE-2026-59850",
      "title": "Libssh: libssh: use-after-free via data callbacks on closed channels",
      "priority": "High",
      "severity": "Moderate",
      "cvss": 8.8,
      "epss": 0.00346,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-59848",
      "url": "https://patchblox.com/security/cve/CVE-2026-59848",
      "title": "Libssh: libssh: denial of service via sftp responses with unknown request ids",
      "priority": "High",
      "severity": "Moderate",
      "cvss": 8.8,
      "epss": 0.00341,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-59847",
      "url": "https://patchblox.com/security/cve/CVE-2026-59847",
      "title": "Libssh: libssh: integrity downgrade via openssl aes-gcm tag verification",
      "priority": "High",
      "severity": "Moderate",
      "cvss": 8.8,
      "epss": 0.00332,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-15370",
      "url": "https://patchblox.com/security/cve/CVE-2026-15370",
      "title": "libssh: A flaw was found in libssh",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00168,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-59846",
      "url": "https://patchblox.com/security/cve/CVE-2026-59846",
      "title": "libssh: A flaw was found in libssh",
      "priority": "High",
      "severity": "low",
      "cvss": 8.8,
      "epss": 0.0012,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-59845",
      "url": "https://patchblox.com/security/cve/CVE-2026-59845",
      "title": "Libssh: libssh: denial of service via unchecked proxycommand fork() failure",
      "priority": "High",
      "severity": "Moderate",
      "cvss": 8.8,
      "epss": 0.00104,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-07T12:40:37Z"
}