{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:*",
            "extracted_events": [
              {
                "introduced": "22.0"
              },
              {
                "last_affected": "22.23.1"
              },
              {
                "introduced": "24.0.0"
              },
              {
                "last_affected": "24.18.0"
              },
              {
                "introduced": "26.0.0"
              },
              {
                "last_affected": "26.5.0"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "12fb157f79da8c094a54bc99370994941c28c235"
            },
            {
              "last_affected": "bd96dfbf0361576724b65322046e2ca9f9609cb9"
            },
            {
              "introduced": "c5349f43cd66d2aa02d86414c9ed426f71d3ae48"
            },
            {
              "last_affected": "20da4aeadabc5b0a01e3fcf520f91df8285c68a2"
            },
            {
              "introduced": "1eaf8a9bd9b665c104bc49f1890e962dddc87d8c"
            },
            {
              "last_affected": "bebd1b8d92bf4cc917844d6335ed1ecf9c2a75fb"
            }
          ],
          "repo": "https://github.com/nodejs/node",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "hackerone",
    "cwe_ids": [
      "CWE-287"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56850.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "26.5.0"
          },
          {
            "last_affected": "26.5.0"
          },
          {
            "introduced": "24.18.0"
          },
          {
            "last_affected": "24.18.0"
          },
          {
            "introduced": "22.23.1"
          },
          {
            "last_affected": "22.23.1"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "A flaw in Node.js HTTPS Agent connection reuse can cause PFX object-array key collisions, allowing mutual TLS (mTLS) client identities to be reused across requests configured with different client certificates.\r\n\r\nThis vulnerability affects Node.js **26.x**, **24.x**, and **22.x**.",
  "id": "CVE-2026-56850",
  "modified": "2026-08-27T11:30:30.420898007Z",
  "published": "2026-07-30T06:02:50.074Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56850.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56850"
    },
    {
      "type": "ARTICLE",
      "url": "https://nodejs.org/en/blog/vulnerability/july-2026-security-releases"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}