CVE-2026-8162 – multiparty vulnerable to Denial of Service via Uncaught Exception in filename* parameter parsing

CVE ID :CVE-2026-8162

Published : May 12, 2026, 10:16 a.m. | 14 minutes ago

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.

Severity: 7.5 | HIGH

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