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01 Record

CVE-2021-3918

Prototype Pollution in kriszyp/json-schema

CriticalPUBLISHEDCNA: @huntrdev
CNA base score9.8 CVSS v3.xCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
View raw JSON

02 Description

Prototype Pollution in kriszyp/json-schema

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
3.83% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 89.9% of scored records. A rank, not a probability.
NVD base score
9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2021-11-13 00:00Z4 YR AGO
Last updated
2025-01-17 20:02Z1 YR AGO
Reserved
2021-11-02
Assigning CNA
@huntrdev
Record state
PUBLISHED
Severity
Critical (CVSS 9.8)
CNA CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
  • CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')Variant
  • CWE-915Improperly Controlled Modification of Dynamically-Determined Object AttributesBase
Data version
5.1
Document digest
c5f8cb049a138d20b5cb50bb19dc851519223f9eec313668a27eb769349c3256

05 Affected products

VendorProductVersionsPlatforms
kriszypkriszyp/json-schema<= 0.3.0—

06 References

07 Fixed in

AlmaLinux 8

  • nodejs
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:14.18.2-2.module_el8.5.0+254+b4526b16
    • Affected before 1:14.18.2-2.module_el8.5.0+2618+8d46dafd
    • Affected before 1:16.13.1-3.module_el8.5.0+246+05401605
    • Affected before 1:16.13.1-3.module_el8.5.0+2605+45d748af
  • nodejs-devel
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:14.18.2-2.module_el8.5.0+254+b4526b16
    • Affected before 1:14.18.2-2.module_el8.5.0+2618+8d46dafd
    • Affected before 1:16.13.1-3.module_el8.5.0+246+05401605
    • Affected before 1:16.13.1-3.module_el8.5.0+2605+45d748af
  • nodejs-docs
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:14.18.2-2.module_el8.5.0+254+b4526b16
    • Affected before 1:14.18.2-2.module_el8.5.0+2618+8d46dafd
    • Affected before 1:16.13.1-3.module_el8.5.0+246+05401605
    • Affected before 1:16.13.1-3.module_el8.5.0+2605+45d748af
  • nodejs-full-i18n
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:14.18.2-2.module_el8.5.0+254+b4526b16
    • Affected before 1:14.18.2-2.module_el8.5.0+2618+8d46dafd
    • Affected before 1:16.13.1-3.module_el8.5.0+246+05401605
    • Affected before 1:16.13.1-3.module_el8.5.0+2605+45d748af
  • nodejs-nodemon
    Fixed

    A version is affected if any line below covers it.

    • Affected before 2.0.15-1.module_el8.5.0+2605+45d748af
    • Affected before 2.0.15-1.module_el8.5.0+2618+8d46dafd
    • Affected before 2.0.15-1.module_el8.6.0+2904+f21ad6f4
  • nodejs-packaging
    Fixed

    A version is affected if any line below covers it.

    • Affected before 23-3.module_el8.4.0+2522+3bd42762
    • Affected before 23-3.module_el8.5.0+2618+8d46dafd
    • Affected before 25-1.module_el8.5.0+246+05401605
    • Affected before 25-1.module_el8.5.0+2605+45d748af
  • npm
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:6.14.15-1.14.18.2.2.module_el8.5.0+254+b4526b16
    • Affected before 1:6.14.15-1.14.18.2.2.module_el8.5.0+2618+8d46dafd
    • Affected before 1:8.1.2-1.16.13.1.3.module_el8.5.0+246+05401605
    • Affected before 1:8.1.2-1.16.13.1.3.module_el8.5.0+2605+45d748af

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 8

  • nodejs
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:14.18.2-2.module_el8.5.0+254+b4526b16
    • Affected before 1:14.18.2-2.module_el8.5.0+2618+8d46dafd
    • Affected before 1:16.13.1-3.module_el8.5.0+246+05401605
    • Affected before 1:16.13.1-3.module_el8.5.0+2605+45d748af
  • nodejs-devel
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:14.18.2-2.module_el8.5.0+254+b4526b16
    • Affected before 1:14.18.2-2.module_el8.5.0+2618+8d46dafd
    • Affected before 1:16.13.1-3.module_el8.5.0+246+05401605
    • Affected before 1:16.13.1-3.module_el8.5.0+2605+45d748af
  • nodejs-docs
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:14.18.2-2.module_el8.5.0+254+b4526b16
    • Affected before 1:14.18.2-2.module_el8.5.0+2618+8d46dafd
    • Affected before 1:16.13.1-3.module_el8.5.0+246+05401605
    • Affected before 1:16.13.1-3.module_el8.5.0+2605+45d748af
  • nodejs-full-i18n
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:14.18.2-2.module_el8.5.0+254+b4526b16
    • Affected before 1:14.18.2-2.module_el8.5.0+2618+8d46dafd
    • Affected before 1:16.13.1-3.module_el8.5.0+246+05401605
    • Affected before 1:16.13.1-3.module_el8.5.0+2605+45d748af
  • nodejs-nodemon
    Fixed

    A version is affected if any line below covers it.

    • Affected before 2.0.15-1.module_el8.5.0+2605+45d748af
    • Affected before 2.0.15-1.module_el8.5.0+2618+8d46dafd
    • Affected before 2.0.15-1.module_el8.6.0+2904+f21ad6f4
  • nodejs-packaging
    Fixed

    A version is affected if any line below covers it.

    • Affected before 23-3.module_el8.4.0+2522+3bd42762
    • Affected before 23-3.module_el8.5.0+2618+8d46dafd
    • Affected before 25-1.module_el8.5.0+246+05401605
    • Affected before 25-1.module_el8.5.0+2605+45d748af
  • npm
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:6.14.15-1.14.18.2.2.module_el8.5.0+254+b4526b16
    • Affected before 1:6.14.15-1.14.18.2.2.module_el8.5.0+2618+8d46dafd
    • Affected before 1:8.1.2-1.16.13.1.3.module_el8.5.0+246+05401605
    • Affected before 1:8.1.2-1.16.13.1.3.module_el8.5.0+2605+45d748af

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • node-json-schema
    Fixed in 0.4.0+~7.0.9-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • node-json-schema
    Fixed in 0.4.0+~7.0.9-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • node-json-schema
    Fixed in 0.4.0+~7.0.9-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 18.04 LTS

  • node-json-schema
    Fixed in 0.2.3-1+deb10u1build0.18.04.1

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 20.04 LTS

  • node-json-schema
    Fixed in 0.2.3-1+deb10u1build0.20.04.1

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.