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CVE-2026-48125

CVE-2026-48125 · UAParser.js: Unbounded `Sec-CH-UA-Model` parsing can trigger ReDoS in `withClientHints()`

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 5.3 · Medium · EPSS 0.5% · Fix available

Published
Updated

Stack: system · node

Affected products and versions

  • ua-parser-js

    Versions
    • >= 2.0.1, < 2.0.10: Affected

    No fix published

  • node-ua-parser-js Debian:12

    Versions
    • 0.8.1+ds+~0.7.36-3
    • 2.0.10+ds+~cs0.3.5-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-ua-parser-js Debian:13

    Versions
    • 0.8.1+ds+~0.7.36-3
    • 2.0.10+ds+~cs0.3.5-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-ua-parser-js Debian:14

    Versions
    • 0.8.1+ds+~0.7.36-3
    Affected ranges
    • ECOSYSTEM: < 2.0.10+ds+~cs0.3.5-1

    Update to 2.0.10+ds+~cs0.3.5-1

  • ua-parser-js npm

    Affected ranges
    • SEMVER: ≥ 2.0.1, < 2.0.10

    Update to 2.0.10

  • node-ua-parser-js Ubuntu:18.04:LTS

    Versions
    • 0.7.14-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-ua-parser-js Ubuntu:20.04:LTS

    Versions
    • 0.7.14-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-ua-parser-js Ubuntu:22.04:LTS

    Versions
    • 0.7.24+ds-1
    • 0.7.24+ds-2
    • 0.7.31+ds+~0.7.36-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-ua-parser-js Ubuntu:24.04:LTS

    Versions
    • 0.8.1+ds+~0.7.36-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-ua-parser-js Ubuntu:26.10

    Versions
    • 0.8.1+ds+~0.7.36-3
    • 2.0.10+ds+~cs0.3.5-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-ua-parser-js Ubuntu:26.04:LTS

    Versions
    • 0.8.1+ds+~0.7.36-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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