Description
multiparty@4.2.3 and lower versions are vulnerable to denial of service via uncaught exception. By sending a multipart/form-data request with a Content-Disposition header whose filename* parameter contains a malformed percent-encoding, the parser invokes decodeURI on the value without try/catch. The resulting URIError propagates as an uncaught exception and crashes the process. Impact: any service accepting multipart uploads via multiparty is affected. Workarounds: none. Upgrade to multiparty@4.3.0 or higher.
Metrics
CVSS 3.1 7.5/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| multiparty | multiparty | <= 4.2.3 |
References
- https://cna.openjsf.org/security-advisories.htmlThird Party Advisory
- https://github.com/pillarjs/multiparty/security/advisories/GHSA-xh3c-6gcq-g4rvVendor Advisory
Timeline
- Published
- May 12, 2026
- Last modified
- Nov 11, 2026
- NVD status
- Analyzed