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TI-2021-06153 Aliases CVE-2021-23509GHSA-8gwj-8hxc-285w

Prototype pollution in json-ptr

Priority MEDIUM 46CWE-843Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-843 and the CVSS impact.

Summary

This affects the package json-ptr before 3.0.0. A type confusion vulnerability can lead to a bypass of CVE-2020-7766 when the user-provided keys used in the pointer parameter are arrays.

Why it matters now

EPSS 0.01828 78th percentileScored 2026-11-07
Fix Fixed json-ptr: 3.0.0json-ptr (npm): 3.0.0

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—json-ptrbefore 3.0.03.0.0Patch availableCNA
—json-ptr (npm)before 3.0.03.0.0Patch availableGHSA-8gwj-8hxc-285w
  • json-ptr Vendor— Affected before 3.0.0 Fixed in 3.0.0 Patch available CNA
  • json-ptr (npm) Vendor— Affected before 3.0.0 Fixed in 3.0.0 Patch available GHSA-8gwj-8hxc-285w

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:json-ptr_project:json-ptr:*:*:*:*:*:*:*:*before 3.0.0VulnerableJson-ptr Project
  • cpe:2.3:a:json-ptr_project:json-ptr:*:*:*:*:*:*:*:* Versions before 3.0.0 Vulnerable ·Json-ptr Project

Remediation

  • Fix · CNA json-ptr Fixed in 3.0.0
  • Fix · GHSA-8gwj-8hxc-285w json-ptr (npm) Fixed in 3.0.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-23509
  2. 2026-10-03 Alias added: GHSA-8gwj-8hxc-285w

References

Patch 2

Advisory 2

Other 1

  • TI-2020-06283 Prototype pollution in json-ptr CVSS 3.1CRITICAL 9.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences