# CVE-2026-48125: node-ua-parser-js: UAParser.js is a JavaScript library to detect browsers, operating systems, CPUs, and devices from user-agent data

CVE-2026-48125 is fixed in node-ua-parser-js on 1 platform by DEBIAN-CVE-2026-48125 (version 2.0.10+ds+~cs0.3.5-1), released July 14, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-48125
- Priority: Routine
- CVSS: 5.3 (medium)
- EPSS: 0.0052
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 14, 2026

## Description

UAParser.js is a JavaScript library to detect browsers, operating systems, CPUs, and devices from user-agent data. From 2.0.1 until 2.0.10, a regular expression denial-of-service vulnerability exists when using the Client Hints API. By sending a crafted Sec-CH-UA-Model header to an application that calls UAParser(headers).withClientHints(), an attacker can cause excessive CPU time due to catastrophic backtracking in the device regex because Client Hints values are copied without the UA_MAX_LENGTH limit used for User-Agent values. This issue is fixed in version 2.0.10.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | node-ua-parser-js Debian 14 | 2.0.10+ds+~cs0.3.5-1 | [DEBIAN-CVE-2026-48125](https://patchblox.com/security/data/fix/linux/debian-cve-2026-48125.md) | Jul 14, 2026 |

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Data as of 2026-11-09T01:18:40Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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