Is ua-parser-js healthy, maintained, and safe?
Maintained, but watch it — ua-parser-js has real signals (drift, thin maintenance, or advisories) worth tracking.
The verdict
On the OSPulse health scale, ua-parser-js lands at 40/100 — medium risk, computed deterministically from live npm release history, maintainer data, and the OSV vulnerability database. Maintained, but watch it — ua-parser-js has real signals (drift, thin maintenance, or advisories) worth tracking.
Its most recent release shipped on 21 May 2026 — 69 days ago — so development is clearly active. 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.
ua-parser-js is usable but carries real signals — pin versions, watch for new advisories, and keep a fallback in mind. 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 (69 days ago)
- Total releases
- 97
- First release
- 28 July 2012
- Package age
- 14.0 years
- Maintainers
- 1
- Known advisories
- 6
- Confidence
- High
Frequently asked
Is ua-parser-js still maintained?
Yes — ua-parser-js released as recently as 21 May 2026 (69 days ago), so it is actively maintained.
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?
Maintained, but watch it — ua-parser-js has real signals (drift, thin maintenance, or advisories) worth tracking. OSPulse rates it 40/100 (medium risk) based on release recency, cadence, maintainer bus factor and known vulnerabilities.
Other npm packages we've checked
ua-parser-js is one package. What about the other hundreds in your tree?
Paste your own package.json into the free health check for an instant snapshot — or let OSPulse monitor your whole dependency tree continuously, before your CVE scanner wakes up.
Data from the npm registry & OSV.dev · snapshot generated 2026-07-28 · scores are deterministic and recomputed on each refresh.