Vulnerability-Lookup

GHSA-6R7G-3MM3-FHW7

Vulnerability from github – Published: 2026-03-30 21:31 – Updated: 2026-03-30 21:31

Details

Node.js already provides timing-safe comparison primitives used elsewhere in the codebase, indicating this is an oversight rather than an intentional design decision.

This vulnerability affects 20.x, 22.x, 24.x, and 25.x.

Severity ?

5.9 (Medium)


                  
                    CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-21713"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-30T20:16:19Z",
    "severity": "MODERATE"
  },
  "details": "A flaw in Node.js HMAC verification uses a non-constant-time comparison when validating user-provided signatures, potentially leaking timing information proportional to the number of matching bytes. Under certain threat models where high-resolution timing measurements are possible, this behavior could be exploited as a timing oracle to infer HMAC values.\n\nNode.js already provides timing-safe comparison primitives used elsewhere in the codebase, indicating this is an oversight rather than an intentional design decision.\n\nThis vulnerability affects **20.x, 22.x, 24.x, and 25.x**.",
  "id": "GHSA-6r7g-3mm3-fhw7",
  "modified": "2026-03-30T21:31:04Z",
  "published": "2026-03-30T21:31:04Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-21713"
    },
    {
      "type": "WEB",
      "url": "https://nodejs.org/en/blog/vulnerability/march-2026-security-releases"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-21713 (GCVE-0-2026-21713)

Vulnerability from cvelistv5 – Published: 2026-03-30 19:07 – Updated: 2026-03-30 19:45

Summary

A flaw in Node.js HMAC verification uses a non-constant-time comparison when validating user-provided signatures, potentially leaking timing information proportional to the number of matching bytes. Under certain threat models where high-resolution timing measurements are possible, this behavior could be exploited as a timing oracle to infer HMAC values. Node.js already provides timing-safe comparison primitives used elsewhere in the codebase, indicating this is an oversight rather than an intentional design decision. This vulnerability affects **20.x, 22.x, 24.x, and 25.x**.

Severity ?

5.9 (Medium)


                        
                          CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Assigner

hackerone

References

URL

Tags

https://nodejs.org/en/blog/vulnerability/march-20…

Impacted products

	Vendor	Product	Version
	nodejs	node	Affected: 20.20.1 , ≤ 20.20.1 (semver) Affected: 22.22.1 , ≤ 22.22.1 (semver) Affected: 24.14.0 , ≤ 24.14.0 (semver) Affected: 25.8.1 , ≤ 25.8.1 (semver) Affected: 4.0 , < 4.* (semver) Affected: 5.0 , < 5.* (semver) Affected: 6.0 , < 6.* (semver) Affected: 7.0 , < 7.* (semver) Affected: 8.0 , < 8.* (semver) Affected: 9.0 , < 9.* (semver) Affected: 10.0 , < 10.* (semver) Affected: 11.0 , < 11.* (semver) Affected: 12.0 , < 12.* (semver) Affected: 13.0 , < 13.* (semver) Affected: 14.0 , < 14.* (semver) Affected: 15.0 , < 15.* (semver) Affected: 16.0 , < 16.* (semver) Affected: 17.0 , < 17.* (semver) Affected: 18.0 , < 18.* (semver) Affected: 19.0 , < 19.* (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-21713",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-30T19:45:13.027379Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-30T19:45:22.905Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "node",
          "vendor": "nodejs",
          "versions": [
            {
              "lessThanOrEqual": "20.20.1",
              "status": "affected",
              "version": "20.20.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "22.22.1",
              "status": "affected",
              "version": "22.22.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "24.14.0",
              "status": "affected",
              "version": "24.14.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "25.8.1",
              "status": "affected",
              "version": "25.8.1",
              "versionType": "semver"
            },
            {
              "lessThan": "4.*",
              "status": "affected",
              "version": "4.0",
              "versionType": "semver"
            },
            {
              "lessThan": "5.*",
              "status": "affected",
              "version": "5.0",
              "versionType": "semver"
            },
            {
              "lessThan": "6.*",
              "status": "affected",
              "version": "6.0",
              "versionType": "semver"
            },
            {
              "lessThan": "7.*",
              "status": "affected",
              "version": "7.0",
              "versionType": "semver"
            },
            {
              "lessThan": "8.*",
              "status": "affected",
              "version": "8.0",
              "versionType": "semver"
            },
            {
              "lessThan": "9.*",
              "status": "affected",
              "version": "9.0",
              "versionType": "semver"
            },
            {
              "lessThan": "10.*",
              "status": "affected",
              "version": "10.0",
              "versionType": "semver"
            },
            {
              "lessThan": "11.*",
              "status": "affected",
              "version": "11.0",
              "versionType": "semver"
            },
            {
              "lessThan": "12.*",
              "status": "affected",
              "version": "12.0",
              "versionType": "semver"
            },
            {
              "lessThan": "13.*",
              "status": "affected",
              "version": "13.0",
              "versionType": "semver"
            },
            {
              "lessThan": "14.*",
              "status": "affected",
              "version": "14.0",
              "versionType": "semver"
            },
            {
              "lessThan": "15.*",
              "status": "affected",
              "version": "15.0",
              "versionType": "semver"
            },
            {
              "lessThan": "16.*",
              "status": "affected",
              "version": "16.0",
              "versionType": "semver"
            },
            {
              "lessThan": "17.*",
              "status": "affected",
              "version": "17.0",
              "versionType": "semver"
            },
            {
              "lessThan": "18.*",
              "status": "affected",
              "version": "18.0",
              "versionType": "semver"
            },
            {
              "lessThan": "19.*",
              "status": "affected",
              "version": "19.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A flaw in Node.js HMAC verification uses a non-constant-time comparison when validating user-provided signatures, potentially leaking timing information proportional to the number of matching bytes. Under certain threat models where high-resolution timing measurements are possible, this behavior could be exploited as a timing oracle to infer HMAC values.\r\n\r\nNode.js already provides timing-safe comparison primitives used elsewhere in the codebase, indicating this is an oversight rather than an intentional design decision.\r\n\r\nThis vulnerability affects **20.x, 22.x, 24.x, and 25.x**."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.0"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-30T19:07:28.356Z",
        "orgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
        "shortName": "hackerone"
      },
      "references": [
        {
          "url": "https://nodejs.org/en/blog/vulnerability/march-2026-security-releases"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
    "assignerShortName": "hackerone",
    "cveId": "CVE-2026-21713",
    "datePublished": "2026-03-30T19:07:28.356Z",
    "dateReserved": "2026-01-04T15:00:06.574Z",
    "dateUpdated": "2026-03-30T19:45:22.905Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-6R7G-3MM3-FHW7

CVE-2026-21713 (GCVE-0-2026-21713)

Tags

Sightings

Nomenclature