CVE-2026-48125

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Source
https://cve.org/CVERecord?id=CVE-2026-48125
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-48125.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-48125
Aliases
Downstream
Published
2026-07-14T20:54:56.374Z
Modified
2026-07-16T03:48:20.098040090Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
Summary
UAParser.js: Unbounded `Sec-CH-UA-Model` parsing can trigger ReDoS in `withClientHints()`
Details

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 UAMAXLENGTH limit used for User-Agent values. This issue is fixed in version 2.0.10.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48125.json",
    "cwe_ids": [
        "CWE-1333",
        "CWE-400"
    ],
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/faisalman/ua-parser-js

Affected ranges

Type
GIT
Repo
https://github.com/faisalman/ua-parser-js
Events
Introduced
51dce55e650eab110f403c2b5e6114b460e52fcd
Fixed
90354d3458495628b1d3ba68a9d76673e6d14fc5
Fixed
bc36dcad87f04142eb92333e501856592c91ccf4
Database specific 
{
    "extracted_events": [
        {
            "introduced": "2.0.1"
        },
        {
            "fixed": "2.0.10"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

2.*
2.0.1
2.0.2
2.0.3
2.0.4
2.0.5
2.0.6
2.0.7
2.0.8
2.0.9

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-48125.json"