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CVE PROGRAM SOURCE RECORD6.3 Medium

CVE-2026-56763

Hono - Prototype Pollution via __proto__ Key in parseBody with dot Option

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Status
Published
Published
Updated
Assigning organization
VulnCheck

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Hono Hono

Default version status: unaffected

  • 0 to < 4.12.7affected
  • 4.12.7unaffected
pkg:npm/hono

References