CVE-2026-8159: fallo de gravedad alta en multiparty
multiparty vulnerable to ReDoS via filename parsing
Publicada el
Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.
21Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 7.5epss 0.3%
multiparty@4.2.3 and lower versions are vulnerable to denial of service via regular expression backtracking in the Content-Disposition filename parameter parser. A crafted multipart upload with a long header value can cause regex matching to take seconds, blocking the event loop. Impact: any service accepting multipart uploads via multiparty is affected. Workarounds: limiting upload sizes at the proxy or gateway layer reduces but does not eliminate the attack surface, since a small header of around 8 KB is sufficient to trigger the vulnerable backtracking. Upgrade to multiparty@4.3.0 or higher.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Productos afectados
multiparty · multipartyCVEs relacionadas — multiparty
En el mismo producto, de las más peligrosas a las menos.
CVE-2026-87908HIGHmultiparty vulnerable to Denial of Service via unbounded part-header accumulationEPSS 0.5%CVE-2026-8161HIGHmultiparty vulnerable to Denial of Service via Prototype Pollution leading to Uncaught ExceptionEPSS 0.5%CVE-2026-8162HIGHmultiparty vulnerable to Denial of Service via Uncaught Exception in filename* parameter parsingEPSS 0.3%