{"cve":"CVE-2021-4279","nvd":{"published":"2022-12-25T20:15:25.610","modified":"2026-06-17T04:19:24.730","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-1321"],"references":["https://github.com/Starcounter-Jack/JSON-Patch/commit/7ad6af41eabb2d799f698740a91284d762c955c9","https://github.com/Starcounter-Jack/JSON-Patch/pull/262","https://github.com/Starcounter-Jack/JSON-Patch/releases/tag/3.1.1","https://vuldb.com/?ctiid.216778","https://vuldb.com/?id.216778"],"products":["starcounter-jack:json-patch"],"source":"nvd","synced_at":"2026-10-19T21:37:31.370122805+00:00"},"epss":{"cve":"CVE-2021-4279","score":0.01156,"percentile":0.67055,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-8gh8-hqwg-xf34","url":"https://osv.dev/vulnerability/GHSA-8gh8-hqwg-xf34","summary":"Starcounter-Jack JSON-Patch Prototype Pollution vulnerability","modified":"2024-03-01T14:21:21Z","packages":[{"ecosystem":"npm","name":"fast-json-patch","purl":"pkg:npm/fast-json-patch","ranges":["<3.1.1"],"fixed":["3.1.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}