Vulnerability-Lookup

GHSA-777R-4CWX-G26V

Vulnerability from github – Published: 2026-07-30 06:32 – Updated: 2026-07-30 06:32

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.

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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-56850"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-30T06:25:55Z",
    "severity": "MODERATE"
  },
  "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.\n\nThis vulnerability affects Node.js **26.x**, **24.x**, and **22.x**.",
  "id": "GHSA-777r-4cwx-g26v",
  "modified": "2026-07-30T06:32:37Z",
  "published": "2026-07-30T06:32:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56850"
    },
    {
      "type": "WEB",
      "url": "https://nodejs.org/en/blog/vulnerability/july-2026-security-releases"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

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

Vulnerability from cvelistv5 – Published: 2026-07-30 06:02 – Updated: 2026-07-30 12:37

Summary

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

hackerone

References

1 reference

URL	Tags
https://nodejs.org/en/blog/vulnerability/july-202…

Impacted products

1 product

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)

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  "containers": {
    "adp": [
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        "metrics": [
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            "other": {
              "content": {
                "id": "CVE-2026-56850",
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                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-30T12:37:02.406813Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-30T12:37:10.100Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
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    "cna": {
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          "product": "node",
          "vendor": "nodejs",
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              "lessThanOrEqual": "26.5.0",
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              "version": "26.5.0",
              "versionType": "semver"
            },
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              "status": "affected",
              "version": "24.18.0",
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            },
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              "lessThanOrEqual": "22.23.1",
              "status": "affected",
              "version": "22.23.1",
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    "dateReserved": "2026-06-23T15:00:03.632Z",
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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

GHSA-777R-4CWX-G26V

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

Tags

Sightings

Nomenclature