Vulnerability Description
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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/browserslist/browserslist/commit/f9914ad9effc865ccc27d8162556
- https://github.com/browserslist/browserslist/releases/tag/4.28.7
- https://github.com/browserslist/browserslist/security/advisories/GHSA-73wf-gq98-
- https://github.com/browserslist/browserslist/security/advisories/GHSA-73wf-gq98-
FAQ
What is CVE-2026-73088?
CVE-2026-73088 is a vulnerability with a CVSS score of 7.5 (HIGH). 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() a...
How severe is CVE-2026-73088?
CVE-2026-73088 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-73088?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.