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CVE-2026-56763

6.3 medium SSVC exploitation: none Deferred
NVD · CVE.org

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.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 1

  1. First seenCVSS 6.3NVD modified 2026-10-25 15:10

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 2