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TI-2021-03137 Aliases CVE-2021-4279GHSA-8gh8-hqwg-xf34

Starcounter-Jack JSON-Patch prototype pollution

Priority MEDIUM 44CWE-1321Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.

Summary

A vulnerability has been found in Starcounter-Jack JSON-Patch up to 3.1.0 and classified as problematic. This vulnerability affects unknown code. The manipulation leads to improperly controlled modification of object prototype attributes ('prototype pollution'). The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 3.1.1 is able to address this issue. The name of the patch is 7ad6af41eabb2d799f698740a91284d762c955c9. It is recommended to upgrade the affected component. VDB-216778 is the identifier assigned to this vulnerability.

Why it matters now

EPSS 0.01156 67th percentileScored 2026-11-08
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix Fixed fast-json-patch (npm): 3.1.1

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
Starcounter-JackJSON-Patch3.0; 3.1—No fix listedCNA
—fast-json-patch (npm)before 3.1.13.1.1Patch availableGHSA-8gh8-hqwg-xf34
  • JSON-Patch VendorStarcounter-Jack Affected 3.0; 3.1 Fixed in — No fix listed CNA
  • fast-json-patch (npm) Vendor— Affected before 3.1.1 Fixed in 3.1.1 Patch available GHSA-8gh8-hqwg-xf34

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:starcounter-jack:json-patch:*:*:*:*:*:*:*:*before 3.1.1VulnerableStarcounter-Jack
  • cpe:2.3:a:starcounter-jack:json-patch:*:*:*:*:*:*:*:* Versions before 3.1.1 Vulnerable ·Starcounter-Jack

Remediation

  • Fix · GHSA-8gh8-hqwg-xf34 fast-json-patch (npm) Fixed in 3.1.1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-4279
  2. 2026-10-03 Alias added: GHSA-8gh8-hqwg-xf34

References

Exploit 1

Patch 2

Advisory 1

Other 3

  • TI-2018-10497 Out-of-bounds write in Red Hat atomic-openshift CVSS 3.1HIGH 7.7

Sources

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