Prototype Pollution in mixin-deep

Also known as GHSA-3mpr-hq3p-49h9

Published 8 y ago 2018-06-07 · modified 4 mo ago 2026-06-17 · JSON

CVSS

8.8

v3.1 · NVD

CISA KEV

not known exploited

EPSS

2.1%

percentile 82%

Public exploits

none known

mixin-deep node module before 1.3.1 suffers from a Modification of Assumed-Immutable Data (MAID) vulnerability, which allows a malicious user to modify the prototype of "Object" via __proto__, causing the addition or modification of an existing property that will exist on all objects.

Exploit prediction (EPSS)

2.09% probability of exploitation in the next 30 days, higher than 82% of all scored CVEs.

CVSS scores

Assigned by	Version	Score	Vector
NVD	3.1	8.8	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
NVD	2.0	6.5	`AV:N/AC:L/Au:S/C:P/I:P/A:P`
GitHub	3.1	8.8	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`

Affected packages

Ecosystem	Package	Affected	Fixed in
npm	`mixin-deep`	<1.3.1	1.3.1

Affected products

HackerOne mixin-deep node module

Classification

Weakness

CWE-471 Modification of Assumed-Immutable Data (MAID)
CWE-20 Improper Input Validation

References

github.com /jonschlinkert/mixin-deep/commit/578b0bc5e74e14de9ef4975f504dc698796bdf9c · x_refsource_MISC, x_transferred
hackerone.com /reports/311236 · x_refsource_MISC, x_transferred
nvd.nist.gov /vuln/detail/CVE-2018-3719 · advisory
github.com /advisories/GHSA-3mpr-hq3p-49h9 · advisory
npmjs.com /advisories/578 · web

Sources

CVE List: CVE-2018-3719
GitHub Advisory: GHSA-3mpr-hq3p-49h9
NVD: CVE-2018-3719

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.

Summary