{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:golang:crypto:*:*:*:*:*:go:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "0.56.0"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "86efde54dc7069251a8b007026c500d28e4239ce"
            }
          ],
          "repo": "https://github.com/golang/crypto",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Go",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/78xxx/CVE-2026-78662.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "fixed": "0.56.0"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "Previously, a channel registered in the mux's chanList is not usable until it is established. A malicious peer was able flood the channel's incomingRequests, deadlocking the entire connection. Now, we add an atomic established state, set when a channel becomes usable. Until such a time, handlePacket drops every packet other than the open confirmation/failure, without blocking and without tearing down the connection.",
  "id": "CVE-2026-78662",
  "modified": "2026-09-06T03:30:41.054424571Z",
  "published": "2026-09-02T19:37:05.741Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://go.dev/cl/826504"
    },
    {
      "type": "WEB",
      "url": "https://go.dev/issue/81316"
    },
    {
      "type": "WEB",
      "url": "https://groups.google.com/g/golang-announce/c/1y3fb2np35U"
    },
    {
      "type": "WEB",
      "url": "https://pkg.go.dev"
    },
    {
      "type": "WEB",
      "url": "https://pkg.go.dev/vuln/GO-2026-6354"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/78xxx/CVE-2026-78662.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-78662"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Prevent DoS on deadlocked undecided channel in golang.org/x/crypto/ssh"
}