CVE-2026-48125 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-48125MEDIUM

faisalman ua-parser-js — UAParser.js: Unbounded `Sec-CH-UA-Model` parsing can trigger ReDoS in `withClientHints()`

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  N  N  L    5.3   .0044   37.2     —

AFFECTED
  Product       Versions              Fixed
  ua-parser-js  >= 2.0.1, < 2.0.10 –  —

TIMELINE
  May 20  Reserved by GitHub_M
  Jul 14  EXPLOIT PUBLISHED — CVE-2026-48125 (faisalman ua-parser-js). Public exploit reference added.
  Jul 14  Published (CNA: GitHub_M)

CWE-400, CWE-1333 · CNA: GitHub_M · CVSS v3.1 · 3 references · NVD status: Analyzed

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
May 20, 2026	Reserved	Reserved by GitHub_M
July 14, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-48125 (faisalman ua-parser-js). Public exploit reference added.
July 14, 2026	Published	Published (CNA: GitHub_M)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
faisalman	ua-parser-js	—	>= 2.0.1, < 2.0.10	—

Weaknesses

CWE-400 · CWE-1333

References (3)

https://github.com/faisalman/ua-parser-js/commit/90354d3458495628b1d3ba68a9d76673e6d14fc5 [Patch]
https://github.com/faisalman/ua-parser-js/releases/tag/2.0.10 [Release Notes]
https://github.com/faisalman/ua-parser-js/security/advisories/GHSA-9h5v-pfqq-x599 [Exploit, Vendor Advisory]

Authoritative record: CVE-2026-48125 at cve.org

Vendors: faisalman

Weaknesses: CWE-400 · CWE-1333

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-48125 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.