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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| faisalman | ua-parser-js | >= 2.0.1, < 2.0.10 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | node-ua-parser-js | 2.0.10+ds+~cs0.3.5-1 | — |
| Debian 13 | node-ua-parser-js | No fix yet | — |
| Debian 12 | node-ua-parser-js | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | node-ua-parser-js | No fix yet | — |
| Ubuntu 26.04 LTS | node-ua-parser-js | No fix yet | — |
| Ubuntu 24.04 LTS | node-ua-parser-js | No fix yet | — |
| Ubuntu 22.04 LTS | node-ua-parser-js | No fix yet | — |
| Ubuntu 20.04 LTS | node-ua-parser-js | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | node-ua-parser-js | No fix yet | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | ua-parser-js | >= 2.0.1, < 2.0.10 | 2.0.10 | GHSA-9h5v-pfqq-x599 |