ReDoS via long UserAgent header in ua-parser
Affected versions of ua-parser are vulnerable to regular expression denial of service when given a specially crafted User-Agent header.
Recommendation
No patch is currently available for this vulnerability.
The best mitigation is currently to avoid using this package, using a different, functionally equivalent package such as useragent.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | ua-parser | <= 0.3.5 | no fix |
References
- Weakness (CWE)
CWE-400- Platform
- npm
- Package
ua-parser- Disclosed
- 24.07.2018
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-pmg9-p9r2-6q87 - CC BY 4.0
Vulnerability history: ua-parser
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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