CVE-2026-8162
HIGHmultiparty vulnerable to Denial of Service via Uncaught Exception in filename* parameter parsing
Title source: cnaDescription
[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.
References (2)
Core 2
Scores
CVSS v3
7.5
EPSS
0.0006
EPSS Percentile
17.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-755
Status
published
Products (4)
multiparty/multiparty
< 4.2.3
multiparty/multiparty
4.3.0
npm/multiparty
0 - 4.3.0npm
pillarjs/multiparty
< 4.3.0
Published
May 12, 2026
Tracked Since
May 12, 2026