What is CVE-2019-10806?

CVE-2019-10806 is a medium-severity vulnerability in Vega Project, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 4.3/10. Published 2020-03-09.

How severe is CVE-2019-10806?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Prototype Pollution in Vega Project

CVE-2019-10806

vega-util prior to 1.13.1 allows manipulation of object prototype. The 'vega.mergeConfig' method within vega-util could be tricked into adding or modifying properties of the Object.prototype.

Vulnerability class: Prototype Pollution

Published 2020-03-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.011 (65.6th percentile), scored 2026-10-24.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 65.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Vega Project
Vega-Util — versions All versions prior to 1.13.1

Weakness classification (CWE)

CWE-1321 — Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution)

References

snyk.io/vuln/SNYK-JS-VEGAUTIL-559223 (Exploit, Third Party Advisory)
github.com/vega/vega/commit/8f33a0b5170d7de4f12fc248ec0901234342367b (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2019-10806?: CVE-2019-10806 is a medium-severity vulnerability in Vega Project, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 4.3/10. Published 2020-03-09.
How severe is CVE-2019-10806?: Medium severity. CVSS v3 base score is 4.3 out of 10.