critical
9.8
CWE
915 1321
Advisory Published
CVE Published
Advisory Published
Updated

CVE-2021-3918: Prototype Pollution in kriszyp/json-schema

First published: Sun Oct 03 2021(Updated: )

json-schema before version 0.4.0 is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution').

Credit: security@huntr.dev security@huntr.dev

Affected SoftwareAffected VersionHow to fix
redhat/rh-nodejs14-nodejs<0:14.18.2-1.el7
0:14.18.2-1.el7
redhat/rh-nodejs14-nodejs-nodemon<0:2.0.3-6.el7
0:2.0.3-6.el7
redhat/rh-nodejs12-nodejs<0:12.22.12-2.el7
0:12.22.12-2.el7
Json-schema Project Json-schema<0.4.0
Debian Debian Linux=10.0
npm/json-schema<0.4.0
0.4.0
redhat/nodejs-json-schema<0.4.0
0.4.0
redhat/node<16.11.0
16.11.0
redhat/npm<8.1.0
8.1.0
<=10.0

Remedy

https://github.com/kriszyp/json-schema/commit/22f146111f541d9737e832823699ad3528ca7741

Remedy

https://huntr.dev/bounties/bb6ccd63-f505-4e3a-b55f-cd2662c261a9

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the vulnerability ID of this vulnerability?

    The vulnerability ID of this vulnerability is CVE-2021-3918.

  • What is the title of this vulnerability?

    The title of this vulnerability is 'json-schema is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ( Prototype Pollution ) vulnerability'.

  • What is the severity of CVE-2021-3918?

    The severity of CVE-2021-3918 is critical with a CVSS score of 9.8.

  • Which software versions are affected by CVE-2021-3918?

    The affected software versions are nodejs-json-schema up to exclusive version 0.4.0, node up to exclusive version 16.11.0, and npm up to exclusive version 8.1.0.

  • How can an attacker exploit CVE-2021-3918?

    An attacker can exploit CVE-2021-3918 by providing a specially crafted JSON file for validation, which can lead to arbitrary code execution.

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