What is CVE-2020-28283?

CVE-2020-28283 is a critical-severity vulnerability in Libnested Project. CVSS score: 9.8/10. Published 2020-12-29.

How severe is CVE-2020-28283?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Libnested Project

CVE-2020-28283

Prototype pollution vulnerability in 'libnested' versions 0.0.0 through 1.5.0 allows an attacker to cause a denial of service and may lead to remote code execution.

Published 2020-12-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.034 (88.3th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 88.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.032 · newest: 0.034 · change: +0.001

Affected products

Libnested Project
Libnested — versions 0.0.0, 1.0.0, 1.1.0, 1.2.1, 1.2.3, 1.3.1, 1.3.2, 1.4.0, 1.4.1, 1.5.0

References

github.com/dominictarr/libnested/blob/d028a1b0f2e5f16fc28e568f52b936ae0bca0647/… (Exploit, Third Party Advisory)
www.whitesourcesoftware.com/vulnerability-database/CVE-2020-28284 (Broken Link)

Frequently asked questions

What is CVE-2020-28283?: CVE-2020-28283 is a critical-severity vulnerability in Libnested Project. CVSS score: 9.8/10. Published 2020-12-29.
How severe is CVE-2020-28283?: Critical severity. CVSS v3 base score is 9.8 out of 10.