CVE-2026-3520
Multer is a node.js middleware for handling `multipart/form-data`. A vulnerability in Multer prior to version 2.1.1 allows an attacker to tr
CVSS
7.5
Alto
EPSS
0.7%
p49
KEV
—
Exploit Today
15
0-100
Publicado: 4 mar 2026 · Última mod.: 15 jul 2026 · CWE-674 · CWE-770
0.7%EPSS · 30 días0.7%
2026-06-302026-07-16
Multer is a node.js middleware for handling `multipart/form-data`. A vulnerability in Multer prior to version 2.1.1 allows an attacker to trigger a Denial of Service (DoS) by sending malformed requests, potentially causing stack overflow. Users should upgrade to version 2.1.1 to receive a patch. No known workarounds are available.
- cna.openjsf.orghttps://cna.openjsf.org/security-advisories.html
- github.comhttps://github.com/expressjs/multer/commit/7e66481f8b2e6c54b982b34c152479e096ce2752
- github.comhttps://github.com/expressjs/multer/security/advisories/GHSA-5528-5vmv-3xc2
- www.cve.orghttps://www.cve.org/CVERecord?id=CVE-2026-3520
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:6174
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:6802
- access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-3520
- bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2444584
- security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3520.json
CVECVSSEPSSKEVRExplotTítuloVis.
CVE-2026-217107.5 ALT97.8%
——29A flaw in Node.js HTTP request handling causes an uncaught `TypeError` when a request is received with a header named `__proto__` and the application accesses `req.headersDistinct`.
When this occurs, `dest["__proto__"]` resolves to `Object.prototype` rather than `undefined`, causing `.push()` to be called on a non-array. This exception is thrown synchronously inside a property getter and cannot be intercepted by `error` event listeners, meaning it cannot be handled without wrapping every `req.headersDistinct` access in a `try/catch`.
* This vulnerability affects all Node.js HTTP servers on **20.x, 22.x, 24.x, and v25.x**2dCVE-2026-261307.5 ALT85.0%
——25Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.2dCVE-2026-489337.5 ALT84.9%
——25A flaw in Node.js WebCrypto implementation can crash the process if the input of `subtle.encrypt()` is a multiple of 2GiB.
This vulnerability affects all supported release lines: **Node.js 22**, **Node.js 24**, and **Node.js 26**.22hCVE-2026-455917.5 ALT82.4%
——25Uncontrolled resource consumption in ASP.NET Core allows an unauthorized attacker to deny service over a network.2dCVE-2021-366307.5 ALT80.5%
——24DDOS reflection amplification vulnerability in eAut module of Ruckus Wireless SmartZone controller that allows remote attackers to perform DOS attacks via crafted request.8dCVE-2025-97847.5 ALT80.2%
——24A flaw was found in Undertow where malformed client requests can trigger server-side stream resets without triggering abuse counters. This issue, referred to as the "MadeYouReset" attack, allows malicious clients to induce excessive server workload by repeatedly causing server-side stream aborts. While not a protocol bug, this highlights a common implementation weakness that can be exploited to cause a denial of service (DoS).17d