PT-2026-43630 · Npm · @Hapi/Content

Published 2026-05-27 · Updated 2026-05-27 · CVE-2026-44974

OSV

CVSS v4.0

7.7

High

Base vector

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

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

Fix

Weakness Enumeration

CWE-436

Related Identifiers

CVE-2026-44974

GHSA-36HH-X5P5-JGC8

Affected Products

@Hapi/Content

References · 4

• https://osv.dev/vulnerability/GHSA-36hh-x5p5-jgc8 · Vendor Advisory
• https://github.com/hapijs/content/commit/3850079550c191d25e3643dc82a6d61144db8c2f · Note
• https://github.com/hapijs/content/security/advisories/GHSA-36hh-x5p5-jgc8 · Note
• https://github.com/hapijs/content · Note