CVE-2026-8162 Details
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.
A denial-of-service vulnerability has been identified in the multiparty package, specifically in versions through 4.2.3. The issue arises when the parser processes a multipart/form-data request with a Content-Disposition header that includes a malformed percent-encoding in the filename parameter. This improper encoding leads to a URIError, which is not caught and causes the process to crash. Any service that accepts multipart uploads using multiparty is susceptible to this vulnerability.
Users are advised to upgrade to multiparty version 4.3.0 or higher.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 12, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://cna.openjsf.org/security-advisories.html | openjs | Third Party Advisory |
| https://github.com/pillarjs/multiparty/security/advisories/GHSA-xh3c-6gcq-g4rv | openjs | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-755 | Improper Handling of Exceptional Conditions | openjs |
Affected Products
| Product | Versions |
|---|---|
| pillarjs multiparty | < 4.3.0 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | openjs |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 13, 2026 | Initial Analysis | [email protected] |
| May 12, 2026 | New CVE Received | openjs |