Security Advisory

CVE-2026-56763

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-11 13:00:59

Last updated 2026-07-14 14:30:12

Assigner VulnCheck

CVSS score 6.3

State PUBLISHED

Description

Hono before 4.12.7 allows __proto__ key in parseBody with dot option enabled, permitting specially crafted form field names to create objects with __proto__ properties. When parsed results are merged into regular JavaScript objects using unsafe merge patterns, attackers can exploit this to achieve prototype pollution and modify object behavior.

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