High severity7.5NVD Advisory· Published May 12, 2026· Updated May 13, 2026
CVE-2026-8162
CVE-2026-8162
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
multipartynpm | < 4.3.0 | 4.3.0 |
Affected products
2cpe:2.3:a:pillarjs:multiparty:*:*:*:*:*:node.js:*:*+ 1 more
- cpe:2.3:a:pillarjs:multiparty:*:*:*:*:*:node.js:*:*range: <4.3.0
- (no CPE)range: <=4.2.3
Patches
Vulnerability mechanics
References
5- cna.openjsf.org/security-advisories.htmlnvdThird Party AdvisoryWEB
- github.com/advisories/GHSA-xh3c-6gcq-g4rvghsaADVISORY
- github.com/pillarjs/multiparty/security/advisories/GHSA-xh3c-6gcq-g4rvnvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-8162ghsaADVISORY
- github.com/pillarjs/multiparty/releases/tag/v4.3.0ghsaWEB
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