# CVE-2026-73088: node-browserslist: Browserslist is a configuration tool for sharing target browsers and Node.js versions between front-end tools

CVE-2026-73088 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-73088, released August 13, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-73088
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0066
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 11, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | node-browserslist Debian 14 | 4.28.7+~cs8.16.65-1 | [DEBIAN-CVE-2026-73088](https://patchblox.com/security/data/fix/linux/debian-cve-2026-73088.md) | Aug 13, 2026 |
| Linux | python-pytest-html opensuse-leap 16.0 | 4.1.1-bp160.5.1 | [OPENSUSE-SU-2026:21602-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21602-1.md) | Aug 18, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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