← CVE Intelligence

CVE-2026-73088

Browserslist: Uncaught crash / prototype write via untrusted browserslist-stats.json custom stats (normalizeStats) PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
browserslist / browserslistaffected < 4.28.7

CWE

CWE-1321, CWE-248

References

ADP enrichment

CISA-ADP

No English description supplied.