PatchTheCVECVE-2020-8147: Flaw in input validation in npm package utils-extend version 1.0.8 and earlier may allow prototype pollution a
CVE-2020-8147 is a critical-severity flaw (CVSS 9.8) affecting utils-extend. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Flaw in input validation in npm package utils-extend version 1.0.8 and earlier may allow prototype pollution attack that may result in remote code execution or denial of service of applications using utils-extend.
Why this priority
- Critical severity
- Public exploit reference
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2020-8147?
utils-extend: upgrade to newer than 1.0.8. Exact commands for each OS are on this page.
Is CVE-2020-8147 being exploited?
CVE-2020-8147 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2020-8147 affect?
CVE-2020-8147 affects utils-extend. Severity is critical (CVSS 9.8). Flaw in input validation in npm package utils-extend version 1.0.8 and earlier may allow prototype pollution attack that may result in remote code execution or denial of service of applications using utils-extend.
How urgent is CVE-2020-8147?
Priority 66/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action