CVE catalog

CVE-2021-3918

node-json-schema affected and fixed versions

[CVE catalog]

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

Severity: Critical · CVSS 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: Oct 3, 2021, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 3.83% · Oct 27, 2026

Projects and upstream resources

[node-json-schema][Source-reported homepage]

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Distribution / release	Package	Version	Status	Source
Debiantrixie	node-json-schema	`0.4.0+~7.0.11-1`	Fixed	[CVE-2021-3918]
Debiantrixie	node-json-schema	`0.4.0+~7.0.9-1`	FixedDistribution-reported fixed boundary	[CVE-2021-3918]
Debiansid	node-json-schema	`0.4.0+~7.0.15-1`	Fixed	[CVE-2021-3918]
Debiansid	node-json-schema	`0.4.0+~7.0.9-1`	FixedDistribution-reported fixed boundary	[CVE-2021-3918]
Debianforky	node-json-schema	`0.4.0+~7.0.15-1`	Fixed	[CVE-2021-3918]
Debianforky	node-json-schema	`0.4.0+~7.0.9-1`	FixedDistribution-reported fixed boundary	[CVE-2021-3918]
Debianbookworm	node-json-schema	`0.4.0+~7.0.11-1`	Fixed	[CVE-2021-3918]
Debianbookworm	node-json-schema	`0.4.0+~7.0.9-1`	FixedDistribution-reported fixed boundary	[CVE-2021-3918]

Showing 8 fix observations. All 13 observations, including unknown and conflicting reports, are available below.

Provider details and historical evidence

Distribution / release	Package	Version	Status	Source
NpmRelease not reported	json-schema	`0.4.0`	UnknownSource applicability is not established	Provider not reported
Debianbookworm	node-json-schema	`0.4.0+~7.0.11-1`	Fixed	[CVE-2021-3918]
Debianbookworm	node-json-schema	`0.4.0+~7.0.9-1`	FixedDistribution-reported fixed boundary	[CVE-2021-3918]
Debianforky	node-json-schema	`0.4.0+~7.0.15-1`	Fixed	[CVE-2021-3918]
Debianforky	node-json-schema	`0.4.0+~7.0.9-1`	FixedDistribution-reported fixed boundary	[CVE-2021-3918]
Debiansid	node-json-schema	`0.4.0+~7.0.15-1`	Fixed	[CVE-2021-3918]
Debiansid	node-json-schema	`0.4.0+~7.0.9-1`	FixedDistribution-reported fixed boundary	[CVE-2021-3918]
Debiantrixie	node-json-schema	`0.4.0+~7.0.11-1`	Fixed	[CVE-2021-3918]
Debiantrixie	node-json-schema	`0.4.0+~7.0.9-1`	FixedDistribution-reported fixed boundary	[CVE-2021-3918]
Ubuntu18.04	node-json-schema	`0.2.3-1`	UnknownSource applicability is not established	[USN-6103-1]Feb 10, 2026, 4:43:08 AM UTC[UBUNTU-CVE-2021-3918]Feb 4, 2026, 4:33:42 AM UTC
Ubuntu18.04	node-json-schema	`0.2.3-1+deb10u1build0.18.04.1`	UnknownSource applicability is not established	[USN-6103-1]Feb 10, 2026, 4:43:08 AM UTC[UBUNTU-CVE-2021-3918]Feb 4, 2026, 4:33:42 AM UTC
Ubuntu20.04	node-json-schema	`0.2.3-1`	UnknownSource applicability is not established	[USN-6103-1]Feb 10, 2026, 4:43:08 AM UTC[UBUNTU-CVE-2021-3918]Feb 4, 2026, 4:33:42 AM UTC
Ubuntu20.04	node-json-schema	`0.2.3-1+deb10u1build0.20.04.1`	UnknownSource applicability is not established	[USN-6103-1]Feb 10, 2026, 4:43:08 AM UTC[UBUNTU-CVE-2021-3918]Feb 4, 2026, 4:33:42 AM UTC

Original provider fields

{
  "package_releases": [
    {
      "name": "node-json-schema",
      "status": "fixed",
      "release": "sid",
      "version": "0.4.0+~7.0.15-1"
    },
    {
      "name": "node-json-schema",
      "status": "fixed",
      "release": "forky",
      "version": "0.4.0+~7.0.15-1"
    },
    {
      "name": "node-json-schema",
      "status": "fixed",
      "release": "trixie",
      "version": "0.4.0+~7.0.11-1"
    },
    {
      "name": "node-json-schema",
      "status": "fixed",
      "release": "bookworm",
      "version": "0.4.0+~7.0.11-1"
    }
  ],
  "fixed_versions": [
    {
      "bug": 999765,
      "name": "node-json-schema",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "0.4.0+~7.0.9-1"
    },
    {
      "bug": 999765,
      "name": "node-json-schema",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "0.4.0+~7.0.9-1"
    },
    {
      "bug": 999765,
      "name": "node-json-schema",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": "0.4.0+~7.0.9-1"
    },
    {
      "bug": 999765,
      "name": "node-json-schema",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": "0.4.0+~7.0.9-1"
    }
  ],
  "distribution_packages": [
    {
      "name": "json-schema",
      "ranges": [
        {
          "type": "SEMVER",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.4.0"
            }
          ]
        }
      ],
      "ecosystem": "npm",
      "fixed_version": "0.4.0",
      "applicability_unknown": true
    },
    {
      "name": "node-json-schema",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.2.3-1+deb10u1build0.18.04.1"
            }
          ]
        }
      ],
      "release": "18.04",
      "versions": [
        "0.2.3-1"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/USN-6103-1",
      "fixed_version": "0.2.3-1+deb10u1build0.18.04.1",
      "provider_source": "pypi",
      "provider_record_id": "USN-6103-1",
      "provider_updated_at": "2026-02-10T04:43:08Z",
      "applicability_unknown": true
    },
    {
      "name": "node-json-schema",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.2.3-1+deb10u1build0.20.04.1"
            }
          ]
        }
      ],
      "release": "20.04",
      "versions": [
        "0.2.3-1"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/USN-6103-1",
      "fixed_version": "0.2.3-1+deb10u1build0.20.04.1",
      "provider_source": "pypi",
      "provider_record_id": "USN-6103-1",
      "provider_updated_at": "2026-02-10T04:43:08Z",
      "applicability_unknown": true
    },
    {
      "name": "node-json-schema",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.2.3-1+deb10u1build0.18.04.1"
            }
          ]
        }
      ],
      "release": "18.04",
      "versions": [
        "0.2.3-1"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-3918",
      "fixed_version": "0.2.3-1+deb10u1build0.18.04.1",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2021-3918",
      "provider_updated_at": "2026-02-04T04:33:42.913683Z",
      "applicability_unknown": true
    },
    {
      "name": "node-json-schema",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.2.3-1+deb10u1build0.20.04.1"
            }
          ]
        }
      ],
      "release": "20.04",
      "versions": [
        "0.2.3-1"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-3918",
      "fixed_version": "0.2.3-1+deb10u1build0.20.04.1",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2021-3918",
      "provider_updated_at": "2026-02-04T04:33:42.913683Z",
      "applicability_unknown": true
    }
  ]
}

[Debian bug #999765]

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[node-json-schema]Unknown
Details (2)
- 0.4.0+~7.0.11-1 · all · bookworm
  Fixed · Fixed: 0.4.0+~7.0.9-1
  dsa · node-json-schema · debian · bookworm; dsa · node-json-schema · debian · 12
- 0.4.0+~7.0.11-1 · all · bookworm
  Fixed · Fixed: 0.4.0+~7.0.9-1
  dsa · node-json-schema · debian · bookworm; dsa · node-json-schema · debian · 12

[Debian 13 (Trixie)]

[node-json-schema]Unknown
Details (2)
- 0.4.0+~7.0.11-1 · all · trixie
  Fixed · Fixed: 0.4.0+~7.0.9-1
  dsa · node-json-schema · debian · 13
- 0.4.0+~7.0.11-1 · all · trixie
  Fixed · Fixed: 0.4.0+~7.0.9-1
  dsa · node-json-schema · debian · 13

Observed: Oct 23, 2026, 6:01:56 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]