HighGHSA-fhg7-m89q-25r3CVE-2022-25927

ReDoS Vulnerability in ua-parser-js version

Published 24 Jan 2023 · Updated 17 Oct 2025

Affected packages

ua-parser-jsnpm

Affected: >=0.7.30 <0.7.33
Fixed in: 0.7.33

Update to the fixed version for your release line, for example:npm install ua-parser-js@0.7.33

ua-parser-jsnpm

Affected: >=0.8.0 <1.0.33
Fixed in: 1.0.33

Update to the fixed version for your release line, for example:npm install ua-parser-js@1.0.33

Details

Description:

A regular expression denial of service (ReDoS) vulnerability has been discovered in ua-parser-js.

Impact:

This vulnerability bypass the library's MAX_LENGTH input limit prevention. By crafting a very-very-long user-agent string with specific pattern, an attacker can turn the script to get stuck processing for a very long time which results in a denial of service (DoS) condition.

Affected Versions:

From version 0.7.30 to before versions 0.7.33 / 1.0.33.

Patches:

A patch has been released to remove the vulnerable regular expression, update to version 0.7.33 / 1.0.33 or later.

References:

Regular expression Denial of Service - ReDoS

Credits:

Thanks to @Snyk who first reported the issue.

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References

Advisory data from OSV.dev (opens OSV.dev in a new tab), refreshed daily.