GHSA-36hh-x5p5-jgc8 @hapi/content header parser has a parameter smuggling issue that allows upload-filter bypass via duplicate parameters

• npm @hapi/content: < 6.0.2 → fixed in 6.0.2

Impact The two parsers resolved duplicates inconsistently and silently: • `Content.disposition()` retained the last occurrence of each parameter. • `Content.type()` retained the first occurrence of charset and boundary. Either behavior creates a parameter-smuggling primitive when another component in the request-processing chain (a WAF, reverse proxy, security filter, or alternate parser) resolves duplicates the opposite way. The primary attack vector is upload filename allowlist bypass: `Content-Disposition: form-data; name="file"; filename="safe.txt"; filename="shell.php"` Patches The issue has been patched in 6.0.2. Workarounds Pre or post validate headers looking for duplicates. Resources • RFC 6266 §4.1 — Content-Disposition syntax • RFC 7231 §3.1.1.1 — Content-Type syntax • RFC 7230 §3.2.6 — token character set