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🛡️ CVE-2026-44974 — content

🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-436 NVD
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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

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](https://www.rfc-editor.org/rfc/rfc6266#section-4.1)
  • [RFC 7231 §3.1.1.1 — Content-Type syntax](https://www.rfc-editor.org/rfc/rfc7231#section-3.1.1.1)
  • [RFC 7230 §3.2.6 — token character set](https://www.rfc-editor.org/rfc/rfc7230#section-3.2.6)

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. Rated impact: confidentiality none, integrity low, availability none.

CVSS metrics in full

The score comes from this vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:H/SA:N

  • Attack vector: Network — reachable from anywhere that can route to the service.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Attack requirements: None — no deployment-specific condition has to hold.
  • Privileges required: None — an unauthenticated stranger can try it.
  • User interaction: None — nobody has to be tricked into anything.
  • Confidentiality impact: None.
  • Integrity impact: Low — limited, and the attacker does not choose what is affected.
  • Availability impact: None.

Weakness class

CVE-2026-44974 is classified as CWE-436: Interpretation Conflict. Two components parse the same data differently, so a check in one is bypassed in the other.

Affected software

CVE-2026-44974 is recorded against 2 packages.

  • @hapi/content
  • unknown

Timeline and source

Published on 27 May 2026 and last revised on 29 May 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com (Web)
github.com (Web)
github.com (Package)

Other advisories for this package

@hapi/content has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-436: Interpretation Conflict) in other software:

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:H/SA:N
CWE CWE-436
Public Exploit ✅ No
Source NVD
Published 2026-05-27
Updated 2026-08-20
Modified 2026-05-29
Fix URL N/A

Affected Packages

Software From version Fixed in
@hapi/content — —
unknown — —

Site Security Check

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CVE-2026-44974 is rated CVSS 8.0 High. BotEraser scans your installation against known CVE records and tells you whether this vulnerability applies to the versions you actually run.

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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