Description
fastest-json-copy version 1.0.1 allows an external attacker to edit or add new properties to an object. This is possible because the application does not correctly validate the incoming JSON keys, thus allowing the '__proto__' property to be edited.
Scores
CVSS v3
5.3
EPSS
0.0033
EPSS Percentile
55.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-1321
Status
published
Products (2)
fastest-json-copy_project/fastest-json-copy
1.0.1
npm/fastest-json-copy
0npm
Published
Nov 03, 2022
Tracked Since
Feb 18, 2026