CVE-2026-73088
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk29th percentile - higher than 29% of all known CVEs
Summary
Browserslist prior to 4.28.7 has a vulnerability in normalizeStats() that processes untrusted stats data without proper guards, potentially causing an uncaught TypeError or modifying the prototype of the returned object.
Risk Assessment
An attacker can cause application crash or compromise object integrity, potentially leading to further attacks.
Recommendation
Update Browserslist to version 4.28.7 or later.
Original NVD description (English source)
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.