Yarn vulnerabilities: known CVEs & security history
Yarn · Dev / Package Manager · 7 tracked CVEs · 0 actively exploited · updated June 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all Yarn release lines — 7 in total. A CVE here doesn't mean your version is affected — check Yarn's current status and the safe version to run.
Known Yarn CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2019-5448 | high | 8.1 | 1% | 2019 |
| CVE-2019-10773 | high | 7.8 | 2% | 2019 |
| CVE-2021-4435 | high | 7.7 | 0% | 2024 |
| CVE-2020-8131 | high | 7.5 | 5% | 2020 |
| CVE-2019-15608 | medium | 5.9 | 2% | 2020 |
| CVE-2025-8262 | medium | 4.3 | 1% | 2025 |
| CVE-2025-9308 | low | 3.3 | 0% | 2025 |
Is my Yarn version affected?
The list above spans every release. To know whether your version is affected — and the minimum safe version to upgrade to — check it directly.
Check your Yarn version → · Monitor Yarn for new CVEs →
Yarn vulnerabilities — frequently asked
How many known vulnerabilities does Yarn have?
IsItPatched tracks 7 CVEs for Yarn. 0 are critical-severity and 4 high-severity. These span every release line — what matters is whether the version you run is affected.
Does Yarn have any actively-exploited vulnerabilities?
None of Yarn's tracked CVEs are currently in CISA's KEV catalog — but new ones can be added at any time, so keep your version current.
What is the most severe Yarn vulnerability?
Among tracked issues, CVE-2019-5448 (HIGH, CVSS 8.1) ranks highest — a CWE-311 weakness.
Is Yarn safe to use?
It depends on the version. The latest supported Yarn release (4.17.0) clears the known issues; older versions may still be affected. Check the exact version you run for a verdict.
CVE data aggregated from NVD, CISA KEV and EPSS (FIRST.org). Related: Yarn security status · Yarn end-of-life · actively-exploited CVEs. Always verify against Yarn's advisories — see our disclaimer.