{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": [
              "cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*",
              "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*",
              "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*",
              "cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*"
            ],
            "extracted_events": [
              {
                "introduced": "6.0"
              },
              {
                "last_affected": "6.0"
              },
              {
                "introduced": "7.0"
              },
              {
                "last_affected": "7.0"
              },
              {
                "introduced": "8.0"
              },
              {
                "last_affected": "8.0"
              },
              {
                "introduced": "9.0"
              },
              {
                "last_affected": "9.0"
              }
            ],
            "source": "CPE_STRING"
          },
          "events": [
            {
              "introduced": "d5dacb43fa30c2f6d7eebbd4c5fcf906c3b5d5d8"
            },
            {
              "last_affected": "94eb6858efecc1b4f02d8a6bd35e149f55c814c8"
            }
          ],
          "repo": "https://github.com/openssh/openssh-portable",
          "type": "GIT"
        }
      ],
      "versions": [
        "6.0",
        "7.0",
        "8.0",
        "9.0"
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "redhat",
    "cwe_ids": [
      "CWE-923"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55655.json"
  },
  "details": "A flaw was found in OpenSSH. A local unprivileged attacker on a Linux client host can hijack client-side X11 forwarding connections. This is possible by pre-binding the preferred abstract X socket name when X11 forwarding is enabled and a local UNIX-domain X socket is used. A successful attack can compromise the confidentiality of forwarded X11 traffic, including sensitive window contents and input, and may allow some manipulation of the forwarded session.",
  "id": "CVE-2026-55655",
  "modified": "2026-07-15T01:49:08.571051049Z",
  "published": "2026-06-23T03:36:25.724Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://access.redhat.com/downloads/content/package-browser/"
    },
    {
      "type": "WEB",
      "url": "https://catalog.redhat.com/software/containers/"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:36759"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/security/cve/CVE-2026-55655"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55655.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55655"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2462250"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Openssh: local mitm of x11 forwarding via abstract unix socket pre-binding in red hat enterprise linux openssh client versions"
}