Prototype Pollution

published 2020-08-17 6 y ago modified 2026-07-08 4 mo ago also GHSA-2c29-wc65-4cx9 , EUVD-2022-1956

cvss: 9.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 2.7%; EPSS 2.7% chance of exploitation in 30 days, percentile 86%
public exploits: 0; none known

The package linux-cmdline before 1.0.1 are vulnerable to Prototype Pollution via the constructor.

Patch / fix

fixed in 2 links 1

npm linux-cmdline 1.0.1
n/a linux-cmdline 1.0.1

github.com/piranna/linux-cmdline@53c61a8 commit

Exploit prediction

2.70% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

snyk.io https://snyk.io/vuln/SNYK-JS-LINUXCMDLINE-598674 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P
GitHub	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
npm	linux-cmdline	<1.0.1	1.0.1

Affected products

n/a linux-cmdline

Classification

Weakness

CWE-1321 Improperly Controlled Modification of Object Prototype Attributes
CWE-20 Improper Input Validation

References

github.com /piranna/linux-cmdline/commit/53c61a88bc47eb25d71832205056beaab95cf677
web, patch, third-party-advisory
snyk.io /vuln/SNYK-JS-LINUXCMDLINE-598674
web, exploit, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2020-7704
advisory
github.com /piranna/linux-cmdline
package

Sources

CVE List CVE-2020-7704
GitHub Advisory GHSA-2c29-wc65-4cx9
NVD CVE-2020-7704

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary