FKIE_CVE-2026-56850

Vulnerability from fkie_nvd - Published: 2026-07-30 06:25 - Updated: 2026-07-30 16:33
Severity
4.1 (Medium) - CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N
Summary
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. This vulnerability affects Node.js **26.x**, **24.x**, and **22.x**.
References
support@hackerone.comhttps://nodejs.org/en/blog/vulnerability/july-2026-security-releases
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "node",
          "vendor": "nodejs",
          "versions": [
            {
              "lessThanOrEqual": "26.5.0",
              "status": "affected",
              "version": "26.5.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "24.18.0",
              "status": "affected",
              "version": "24.18.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "22.23.1",
              "status": "affected",
              "version": "22.23.1",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "support@hackerone.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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",
  "lastModified": "2026-07-30T16:33:59.580",
  "metrics": {
    "cvssMetricV30": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "NONE",
          "baseScore": 4.1,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N",
          "version": "3.0"
        },
        "exploitabilityScore": 0.5,
        "impactScore": 3.6,
        "source": "support@hackerone.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-56850",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-30T12:37:02.406813Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-30T06:25:55.073",
  "references": [
    {
      "source": "support@hackerone.com",
      "url": "https://nodejs.org/en/blog/vulnerability/july-2026-security-releases"
    }
  ],
  "sourceIdentifier": "support@hackerone.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
        }
      ],
      "source": "support@hackerone.com",
      "type": "Secondary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.