CVE-2026-44456: Hono: bodyLimit() can be bypassed for chunked / unknown-length requests

May 6, 2026 (updated May 14, 2026)

bodyLimit() does not reliably enforce maxSize for requests without a usable Content-Length (e.g. Transfer-Encoding: chunked). Oversized requests can reach handlers and return 200 instead of 413.

References

github.com/advisories/GHSA-9vqf-7f2p-gf9v
github.com/honojs/hono/security/advisories/GHSA-9vqf-7f2p-gf9v
nvd.nist.gov/vuln/detail/CVE-2026-44456

Code Behaviors & Features

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