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CVE-2026-8657

HIGH · CVSS 8.2 EPSS 0.07% Public Exploit

Source: NVD + CISA KEV + EPSS · Published: 2026-05-16 · Last synced: 2026-06-09

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Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

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CVE
CVE-2026-8657
Severity
HIGH
CVSS
8.2
EPSS
0.07%

Original NVD Description

Versions of the package jsondiffpatch before 0.7.6 are vulnerable to Prototype Pollution via the jsondiffpatch.patch() and jsondiffpatch/formatters/jsonpatch.patch() APIs. An attacker can perform prototype pollution by supplying crafted delta or JSON Patch documents, as attacker-controlled property names and path segments are used to traverse and modify objects without restricting access to special properties like __proto__ or constructor.prototype, allowing modification of Object.prototype.