CVE-2026-73088

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 v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
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

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-11 17:19

Updated : 2026-09-09 20:44

NVD link : CVE-2026-73088

Mitre link : CVE-2026-73088

CVE.ORG link : CVE-2026-73088

JSON object : View

Products Affected

No product.

CWE

CWE-248

Uncaught Exception

CWE-1321

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

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