Is there a public exploit for CVE-2026-56763?

No public exploit for CVE-2026-56763 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-56763?

CVE-2026-56763 scores CVSS 6.3 (v4.0), rated medium. EPSS puts the chance of exploitation in the next 30 days at 0.27%.

What does CVE-2026-56763 affect?

CVE-2026-56763 affects Hono hono.

6.3 Medium

Hono before 4.12.7 allows proto key in parseBody with dot option enabled, permitting specially crafted form field names to create objects…

CVE-2026-56763

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.

Assessment

CVSS: 6.3 (v4.0)
Severity: Medium
EPSS: 0.27% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 11 July 2026
Last updated: 25 October 2026
Affected: Hono · hono
Weakness: CWE-1321
Assigner: disclosure@vulncheck.com

CVSS vectorCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

At the source

References

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