CVE-2026-8162
High
Description
[email protected] 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 [email protected] or higher.
SeverityHigh
CVSS7.5
Exploit probability—
ProductPillarjs Multiparty
PublishedMay 12, 2026
First seenMay 12, 2026
Weakness typeCWE-755CWE-755
How to fix
Update
- pillarjs multiparty4.3.0 or later
- multiparty4.3.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| pillarjs multiparty | v < 4.3.0 | 4.3.0 |
| multipartynpm | v < 4.3.0 | 4.3.0 |
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