CVE-2026-56850 (GCVE-0-2026-56850)

Vulnerability from cvelistv5 – Published: 2026-07-30 06:02 – Updated: 2026-07-30 12:37
VLAI
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**.
Severity
4.1 (Medium)
CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-287 - Improper Authentication - Generic
Assigner
References
Impacted products
Vendor Product Version
nodejs node Affected: 26.5.0 , ≤ 26.5.0 (semver)
Affected: 24.18.0 , ≤ 24.18.0 (semver)
Affected: 22.23.1 , ≤ 22.23.1 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-56850",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-30T12:37:02.406813Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-30T12:37:10.100Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "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"
            }
          ]
        }
      ],
      "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**."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "baseScore": 4.1,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-287",
              "description": "CWE-287 Improper Authentication - Generic",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-30T06:02:50.074Z",
        "orgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
        "shortName": "hackerone"
      },
      "references": [
        {
          "url": "https://nodejs.org/en/blog/vulnerability/july-2026-security-releases"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
    "assignerShortName": "hackerone",
    "cveId": "CVE-2026-56850",
    "datePublished": "2026-07-30T06:02:50.074Z",
    "dateReserved": "2026-06-23T15:00:03.632Z",
    "dateUpdated": "2026-07-30T12:37:10.100Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-56850",
      "date": "2026-08-01",
      "epss": "0.00079",
      "percentile": "0.00179"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-56850\",\"sourceIdentifier\":\"support@hackerone.com\",\"published\":\"2026-07-30T06:25:55.073\",\"lastModified\":\"2026-07-30T16:33:59.580\",\"vulnStatus\":\"Awaiting Analysis\",\"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**.\"}],\"affected\":[{\"source\":\"support@hackerone.com\",\"affectedData\":[{\"vendor\":\"nodejs\",\"product\":\"node\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"26.5.0\",\"lessThanOrEqual\":\"26.5.0\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"24.18.0\",\"lessThanOrEqual\":\"24.18.0\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"22.23.1\",\"lessThanOrEqual\":\"22.23.1\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV30\":[{\"source\":\"support@hackerone.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.0\",\"vectorString\":\"CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N\",\"baseScore\":4.1,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"HIGH\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":0.5,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-07-30T12:37:02.406813Z\",\"id\":\"CVE-2026-56850\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"support@hackerone.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-287\"}]}],\"references\":[{\"url\":\"https://nodejs.org/en/blog/vulnerability/july-2026-security-releases\",\"source\":\"support@hackerone.com\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-31T03:57:33+00:00",
      "cve": "CVE-2026-56850",
      "id": "CVE-2026-56850",
      "initial_release_date": "2026-07-30T06:02:50.074000+00:00",
      "product_status:fixed": "12",
      "product_status:known_affected": "56",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "nodejs: Node.js: mTLS client identities can be reused due to HTTPS Agent connection flaw",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-56850.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-30T16:37:47Z",
      "cve": "CVE-2026-56850",
      "id": "CVE-2026-56850",
      "initial_release_date": "2026-07-30T16:37:47Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-56850",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-56850.json",
      "version": "2"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-56850\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-07-30T12:37:02.406813Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-07-30T12:36:54.201Z\"}}], \"cna\": {\"metrics\": [{\"cvssV3_0\": {\"version\": \"3.0\", \"baseScore\": 4.1, \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N\"}}], \"affected\": [{\"vendor\": \"nodejs\", \"product\": \"node\", \"versions\": [{\"status\": \"affected\", \"version\": \"26.5.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"26.5.0\"}, {\"status\": \"affected\", \"version\": \"24.18.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"24.18.0\"}, {\"status\": \"affected\", \"version\": \"22.23.1\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"22.23.1\"}], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://nodejs.org/en/blog/vulnerability/july-2026-security-releases\"}], \"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**.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-287\", \"description\": \"CWE-287 Improper Authentication - Generic\"}]}], \"providerMetadata\": {\"orgId\": \"36234546-b8fa-4601-9d6f-f4e334aa8ea1\", \"shortName\": \"hackerone\", \"dateUpdated\": \"2026-07-30T06:02:50.074Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-56850\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-30T12:37:10.100Z\", \"dateReserved\": \"2026-06-23T15:00:03.632Z\", \"assignerOrgId\": \"36234546-b8fa-4601-9d6f-f4e334aa8ea1\", \"datePublished\": \"2026-07-30T06:02:50.074Z\", \"assignerShortName\": \"hackerone\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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

Author Source Type Date Other

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.