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.

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Fixes

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History

Tue, 12 May 2026 13:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 12 May 2026 09:30:00 +0000

Type Values Removed Values Added
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.
Title multiparty vulnerable to Denial of Service via Uncaught Exception in filename* parameter parsing
Weaknesses CWE-755
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: openjs

Published:

Updated: 2026-05-12T12:33:12.647Z

Reserved: 2026-05-08T11:05:42.781Z

Link: CVE-2026-8162

cve-icon Vulnrichment

Updated: 2026-05-12T12:33:08.706Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-05-12T10:16:49.110

Modified: 2026-05-12T15:08:22.857

Link: CVE-2026-8162

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-12T10:45:14Z

Weaknesses