Is ua-parser-js healthy, maintained, and safe?
Use with caution — ua-parser-js shows serious drift or security signals you should review before relying on it.
The verdict
On the OSPulse health scale, ua-parser-js lands at 35/100 — high risk, computed deterministically from live npm release history, maintainer data, and the OSV vulnerability database. Use with caution — ua-parser-js shows serious drift or security signals you should review before relying on it.
The last release was 21 May 2026 (109 days ago); still within a normal window, but the cadence has quietened. Across 97 releases the cadence has been steady, which is a good sign of an ongoing maintenance rhythm. Ownership rests on a single maintainer — a bus-factor of one, meaning one person's availability is a single point of failure for everyone downstream.
OSV lists 6 known advisories for ua-parser-js, including 5 high. Review whether your version is in the affected range and whether a fixed release is available before depending on it. Each advisory is listed with its OSV/GHSA identifier below.
Treat ua-parser-js as a liability to manage: review the evidence above, pin or patch, and evaluate alternatives. This is a one-time snapshot of a single package — real projects depend on dozens or hundreds of packages, and any one of them can drift or be compromised between releases. Run your own package.json through the free health check, or have OSPulse monitor your whole dependency tree continuously.
Evidence trail — deterministic, auditable
Known vulnerabilities (6)
ua-parser-js Regular Expression Denial of Service vulnerability
Regular Expression Denial of Service in ua-parser-js
Regular Expression Denial of Service (ReDoS) in ua-parser-js
UAParser.js: Unbounded `Sec-CH-UA-Model` parsing can trigger ReDoS in `withClientHints()`
ReDoS Vulnerability in ua-parser-js version
Embedded malware in ua-parser-js
Key facts
- Latest version
- v2.0.10
- Last release
- 21 May 2026 (109 days ago)
- Total releases
- 97
- First release
- 28 July 2012
- Package age
- 14.1 years
- Maintainers
- 1
- Known advisories
- 6
- Confidence
- High
Frequently asked
Is ua-parser-js still maintained?
Partly — the most recent release was 21 May 2026 (109 days ago), so maintenance has slowed but not fully stopped.
Does ua-parser-js have known security vulnerabilities?
Yes — OSV lists 6 advisories for ua-parser-js. See the advisory list on this page for the OSV/GHSA identifiers.
Is ua-parser-js safe to use?
Use with caution — ua-parser-js shows serious drift or security signals you should review before relying on it. OSPulse rates it 35/100 (high risk) based on release recency, cadence, maintainer bus factor and known vulnerabilities.
Alternatives to ua-parser-js
Other npm packages we've checked
ua-parser-js is one package. What about the other hundreds in your tree?
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Data from the npm registry & OSV.dev · snapshot generated 2026-09-07 · scores are deterministic and recomputed on each refresh.