FKIE_CVE-2026-73088

Vulnerability from fkie_nvd - Published: 2026-08-11 17:19 - Updated: 2026-08-13 15:20
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
Browserslist is a configuration tool for sharing target browsers and Node.js versions between front-end tools. Prior to 4.28.7, normalizeStats() in node.js, reached unconditionally through getStat() and loadStat() on every browserslist() call, processes untrusted browserslist-stats.json, opts.stats, and CLI --stats data with an unguarded for...in loop and plain-object bracket access and assignment, allowing inherited Object.prototype keys including __proto__, toString, valueOf, constructor, hasOwnProperty, and isPrototypeOf to cause an uncaught TypeError or modify the prototype of the returned normalized object. This issue is fixed in version 4.28.7.
References
security-advisories@github.comhttps://github.com/browserslist/browserslist/commit/f9914ad9effc865ccc27d816255625890b31ca51
security-advisories@github.comhttps://github.com/browserslist/browserslist/releases/tag/4.28.7
security-advisories@github.comhttps://github.com/browserslist/browserslist/security/advisories/GHSA-73wf-gq98-2v4g
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/browserslist/browserslist/security/advisories/GHSA-73wf-gq98-2v4g
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "browserslist",
          "vendor": "browserslist",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 4.28.7"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Browserslist is a configuration tool for sharing target browsers and Node.js versions between front-end tools. Prior to 4.28.7, normalizeStats() in node.js, reached unconditionally through getStat() and loadStat() on every browserslist() call, processes untrusted browserslist-stats.json, opts.stats, and CLI --stats data with an unguarded for...in loop and plain-object bracket access and assignment, allowing inherited Object.prototype keys including __proto__, toString, valueOf, constructor, hasOwnProperty, and isPrototypeOf to cause an uncaught TypeError or modify the prototype of the returned normalized object. This issue is fixed in version 4.28.7."
    }
  ],
  "id": "CVE-2026-73088",
  "lastModified": "2026-08-13T15:20:06.333",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-73088",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-13T14:50:35.461987Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-11T17:19:16.977",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/browserslist/browserslist/commit/f9914ad9effc865ccc27d816255625890b31ca51"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/browserslist/browserslist/releases/tag/4.28.7"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/browserslist/browserslist/security/advisories/GHSA-73wf-gq98-2v4g"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/browserslist/browserslist/security/advisories/GHSA-73wf-gq98-2v4g"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-248"
        },
        {
          "lang": "en",
          "value": "CWE-1321"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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