GHSA-3wcj-gjvf-fvchMedium· 4.8▾ SunlitDuplicate Advisory: Hono vulnerable to Prototype Pollution possible through __proto__ key allowed in parseBody({ dot: true })
▾ Sunlit zone — Low / medium · no exploitation signal
impact 26.4 · likelihood 0 · exploitation 0
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Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via GHSA
Last analysed / modified upstream
This advisory has been withdrawn because it is a duplicate of GHSA-v8w9-8mx6-g223. This link is maintained to preserve external references.
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.
hono < 4.12.7Refer to the advisory for the patched release.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-56763Medium· 4.8Hono 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
GHSA-cw3j-28qq-x3xhMedium· 6.5Duplicate Advisory: Hono vulnerable to Vary Header Injection leading to potential CORS Bypass
CVE-2025-71381Medium· 4.2Hono vulnerable to Vary Header Injection leading to potential CORS Bypass
GHSA-6623-4q32-82v8Low· 4.7Duplicate Advisory: hono/jsx renders plain strings unescaped in boundary components, leading to XSS
GHSA-55cm-p4ww-685gMedium· 5.3Duplicate Advisory: Hono missing validation of cookie name on write path in setCookie()
CVE-2026-56762Medium· 5.3Hono missing validation of cookie name on write path in setCookie()