What is GHSA-3wcj-gjvf-fvch?

GHSA-3wcj-gjvf-fvch is a security advisory published by GitHub Security Advisories with Medium severity. Hono before 4.12.7 allows __proto__ key in parseBody with dot option enabled, permitting...

Which CVE IDs does GHSA-3wcj-gjvf-fvch cover?

GHSA-3wcj-gjvf-fvch covers the following CVE IDs: CVE-2026-56763. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-3wcj-gjvf-fvch?

GHSA-3wcj-gjvf-fvch has a CVSS v3 base score of 4.8, published by GitHub Security Advisories.

GHSA-3wcj-gjvf-fvchMediumCVSS 4.8

Hono before 4.12.7 allows proto key in parseBody with dot option enabled, permitting...

Vendor

GitHub Security Advisories

Published

July 11, 2026

Last Modified

July 11, 2026

🔗 CVE IDs covered (1)

CVE-2026-56763 →

📋 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.

🔗 References (4)

https://github.com/honojs/hono/security/advisories/GHSA-v8w9-8mx6-g223
https://nvd.nist.gov/vuln/detail/CVE-2026-56763
https://www.vulncheck.com/advisories/hono-prototype-pollution-via-proto-key-in-parsebody-with-dot-option
https://github.com/advisories/GHSA-3wcj-gjvf-fvch