Medium 5.3Published Jul 14, 2026

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

Updated under an hour ago (2026-10-19 07:30 UTC)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for ua-parser-js_project ua-parser-js

Exploited in the last 30 days

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 (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness (CWE): CWE-400, CWE-1333
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Aug 6, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

ua-parser-js_project ua-parser-js ua-parser-js_project:ua-parser-js	from 2.0.1 before 2.0.10	NVD

References

https://github.com/faisalman/ua-parser-js/commit/90354d3458495628b1d3ba68a9d76673e6d14fc5patch
https://github.com/faisalman/ua-parser-js/releases/tag/2.0.10release-notes
https://github.com/faisalman/ua-parser-js/security/advisories/GHSA-9h5v-pfqq-x599exploit, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.