CVE-2026-8657
High · 8.2CVSS
8.2
EPSS
0.7%
Published
May 16, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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