PT-2026-49551 · Debian+4 · Node-Ua-Parser-Js+1

CVE-2026-48125 · Published 2026-06-15 · Updated 2026-07-14

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Name of the Vulnerable Software and Affected Versions UAParser.js versions 2.0.1 through 2.0.9

Description A regular expression denial-of-service (ReDoS) exists when using the Client Hints API. An attacker can cause excessive CPU consumption and a denial-of-service condition in server-side applications by sending a crafted Sec-CH-UA-Model header to an application that calls the withClientHints() function. This occurs because Client Hints values are processed without the length limits applied to User-Agent values, leading to catastrophic backtracking in the device regular expression. Catastrophic backtracking is a condition where a regular expression engine takes an exponential amount of time to determine that a string does not match a pattern.

Recommendations Update UAParser.js to version 2.0.10 or later.

Exploit

Fix

Resource Exhaustion

DoS

Weakness Enumeration

CWE-400

CWE-1333

Related Identifiers

CVE-2026-48125

GHSA-9H5V-PFQQ-X599

Affected Products

Node-Ua-Parser-Js

Ua-Parser-Js

References · 13

• 🔥 https://github.com/faisalman/ua-parser-js/security/advisories/GHSA-9h5v-pfqq-x599 · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48125.json · Exploit
• https://security-tracker.debian.org/tracker/CVE-2026-48125 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-48125 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-48125 · Security Note
• https://ubuntu.com/security/CVE-2026-48125 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-48125 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-48125 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-48125 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-9h5v-pfqq-x599 · Vendor Advisory
• https://github.com/faisalman/ua-parser-js/commit/90354d3458495628b1d3ba68a9d76673e6d14fc5 · Note
• https://github.com/faisalman/ua-parser-js/releases/tag/2.0.10 · Note
• https://github.com/faisalman/ua-parser-js · Note