CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2026-73088
High (7.5). EPSS 0.7% chance of exploitation in the next 30 days. Fixed in browserslist 4.28.7.
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.
Severity
- EPSS
- 0.7% chance of exploitation in the next 30 days; higher than 51% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-248, CWE-1321
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-73wf-gq98-2v4g | npm | browserslist | <4.28.7 | 4.28.7 |
References
- https://github.com/browserslist/browserslist/commit/f9914ad9effc865ccc27d816255625890b31ca51
- https://github.com/browserslist/browserslist/releases/tag/4.28.7
- https://github.com/browserslist/browserslist/security/advisories/GHSA-73wf-gq98-2v4g
- https://github.com/browserslist/browserslist/security/advisories/GHSA-73wf-gq98-2v4g