What’s Vulnerable › Vulnerabilities

CVE-2022-41714: fastest-json-copy 1.0.1 - Prototype Pollution

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-11-03 · updated 2026-06-17
• Weakness: CWE-1321

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.

Affected products

• fastest-json-copy: 1.0.1

References

• https://fluidattacks.com/advisories/guetta/
• https://github.com/streamich/fastest-json-copy
• https://fluidattacks.com/advisories/guetta/
• https://github.com/streamich/fastest-json-copy

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