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Fencer Vulns
medium 5.3

CVE-2020-7608 json

yargs-parser Vulnerable to Prototype Pollution

published 2020-03-16 6 y ago modified 2026-07-08 4 mo ago also GHSA-p9pc-299p-vxgp , EUVD-2020-1208

cvss
5.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 44%
public exploits
0
none known

Summary

yargs-parser could be tricked into adding or modifying properties of Object.prototype using a "__proto__" payload.

Patch / fix

  • npm yargs-parser 5.0.1, 13.1.2, 15.0.1, 18.1.1
  • yargs yargs-parser 5.0.1, 13.1.2, 15.0.1, 18.1.1
  • node-yargs-parser Debian 14, Debian 13, Debian 12 18.1.1-1

debian advisories DEBIAN-CVE-2020-7608

  • rh-nodejs12-nodejs RHEL 3 SOFTWARE_COLLECTIONS 12.19.1-2.el7
  • rh-nodejs12-npm RHEL 3 SOFTWARE_COLLECTIONS 6.14.8-12.19.1.2.el7
  • npm RHEL 8 1:6.14.10-1.10.23.1.1.module+el8.3.0+9502+012d8a97
  • nodejs RHEL 8 1:10.23.1-1.module+el8.3.0+9502+012d8a97
  • nodejs-nodemon RHEL 8 1.18.3-1.module+el8+2632+6c5111ed
  • nodejs-full-i18n RHEL 8 1:10.23.1-1.module+el8.3.0+9502+012d8a97
  • nodejs-packaging RHEL 8 17-3.module+el8+2873+aa7dfd9a
  • rh-nodejs10-nodejs RHEL 3 SOFTWARE_COLLECTIONS 10.23.1-2.el7

red hat advisories RHSA-2020:5305RHSA-2021:0548RHSA-2021:0521RHSA-2020:5499

  • nodejs-nodemon AlmaLinux 8 1.18.3-1.module_el8.3.0+2023+d2377ea3
  • nodejs-nodemon AlmaLinux 8 1.18.3-1.module_el8.3.0+2047+b07ac28e
  • nodejs-packaging AlmaLinux 8 17-3.module_el8.4.0+2224+b07ac28e
  • nodejs-packaging AlmaLinux 8 17-3.module_el8.4.0+2521+c668cc9f
  • nodejs-packaging AlmaLinux 8 17-3.module_el8.3.0+2023+d2377ea3

almalinux advisories ALSA-2021:0548ALSA-2020:5499

  • nodejs-nodemon Rocky Linux 8 1.18.3-1.module+el8.3.0+101+f84c7154
  • nodejs-packaging Rocky Linux 8 17-3.module+el8.3.0+101+f84c7154

rocky linux advisories RLSA-2021:0548RLSA-2020:5499

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-7608 updated cvss 5.3

nodejs-yargs-parser: prototype pollution vulnerability

  • Red Hat Quay v3 quay/quay-rhel8 v3.6.0-62
    fixed: vendor fix RHSA-2021:3917
  • Red Hat Enterprise Linux AppStream (v. 8) nodejs 10.23.1-1.module+el8.3.0+9502+012d8a97, nodejs 12.19.1-1.module+el8.3.0+8851+b7b41ca0, nodejs-packaging 17-3.module+el8+2873+aa7dfd9a, nodejs-nodemon 1.18.3-1.module+el8+2632+6c5111ed, nodejs-packaging 17-3.module+el8.1.0+3369+37ae6a45, npm 6.14.8-1.12.19.1.1.module+el8.3.0+8851+b7b41ca0, +4 more
    fixed: vendor fix RHSA-2021:0548
  • Red Hat OpenShift Container Storage 4.7 on RHEL-8 ocs4/mcg-core-rhel8 5.7.0-60.2c1fdb0.5.7
    fixed: vendor fix RHSA-2021:2041
  • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-nodejs10-nodejs 10.23.1-2.el7, rh-nodejs12-nodejs 12.19.1-2.el7, rh-nodejs12-npm 6.14.8-12.19.1.2.el7, rh-nodejs10-npm 6.14.10-10.23.1.2.el7 Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) rh-nodejs10-nodejs 10.23.1-2.el7, rh-nodejs12-nodejs 12.19.1-2.el7, rh-nodejs12-npm 6.14.8-12.19.1.2.el7, rh-nodejs10-npm 6.14.10-10.23.1.2.el7 Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) rh-nodejs10-nodejs 10.23.1-2.el7, rh-nodejs12-nodejs 12.19.1-2.el7, rh-nodejs12-npm 6.14.8-12.19.1.2.el7, rh-nodejs10-npm 6.14.10-10.23.1.2.el7 Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-nodejs10-nodejs 10.23.1-2.el7, rh-nodejs12-nodejs 12.19.1-2.el7, rh-nodejs12-npm 6.14.8-12.19.1.2.el7, rh-nodejs10-npm 6.14.10-10.23.1.2.el7
    fixed: vendor fix RHSA-2021:0521
  • Red Hat Quay v3 quay/clair-rhel8 v3.6.0-70, quay/quay-builder-rhel8 v3.6.0-44, quay/quay-operator-rhel8 v3.6.0-43, quay/quay-operator-bundle v3.6.0-48, quay/quay-bridge-operator-rhel8 v3.6.0-40, quay/quay-bridge-operator-bundle v3.6.0-35, +3 more Red Hat OpenShift Container Storage 4.7 on RHEL-8 ocs4/ocs-operator-bundle 4.7.0-11, ocs4/mcg-rhel8-operator 5.7.0-69.85e2026.5.7, ocs4/cephcsi-rhel8 4.7-102.5c44836.release_4.7, ocs4/ocs-rhel8-operator 4.7-174.7f14177.release_4.7, ocs4/ocs-must-gather-rhel8 4.7-174.7f14177.release_4.7, ocs4/rook-ceph-rhel8-operator 4.7-140.49a6fcf.release_4.7
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.51% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • snyk.io https://snyk.io/vuln/SNYK-JS-YARGSPARSER-560381 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 5.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P
GitHub 3.1 5.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Affected packages

ecosystem package affected fixed in
npm yargs-parser
>=6.0.0, <13.1.2
>=14.0.0, <15.0.1
>=16.0.0, <18.1.1
<5.0.1
13.1.2
15.0.1
18.1.1
5.0.1

Affected products

  • n/a yargs-parser

Classification

Weakness
  • CWE-1321 Improperly Controlled Modification of Object Prototype Attributes
  • CWE-915 Improperly Controlled Modification of Dynamically-Determined Object Attributes

References

Sources

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.