CVE-2026-5079— Multer 深度嵌套字段名拒绝服务漏洞
可能的 ATT&CK 技术 1AI
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一、 漏洞 CVE-2026-5079 基础信息
漏洞信息
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Vulnerability Title
multer vulnerable to Denial of Service via deeply nested field names
来源: 美国国家漏洞数据库 NVD
Vulnerability Description
Impact: multer versions 1.0.0 through 2.1.1 and 3.0.0-alpha.1 are vulnerable to a Denial of Service via deeply nested field names in multipart form data. The append-field dependency parses bracket notation in field names with no limit on nesting depth, allowing an attacker to force allocation of deeply nested object structures that consume CPU and memory. A single HTTP request with a crafted multipart body is sufficient to exploit this. Patches: Users should upgrade to multer 2.2.0 (2.x line) or 3.0.0-alpha.2 (3.x prerelease) and configure the new limits.fieldNestingDepth option to the minimum depth their application requires. Workarounds: Set limits.fields to a reasonable value to reduce the number of fields an attacker can send per request. This does not fully mitigate the issue but limits the impact.
来源: 美国国家漏洞数据库 NVD
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
来源: 美国国家漏洞数据库 NVD
Vulnerability Type
未加控制的资源消耗(资源穷尽)
来源: 美国国家漏洞数据库 NVD
受影响产品
二、漏洞 CVE-2026-5079 的公开POC
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CVE-2026-5079 厂商安全公告 (1)
IV. Related Vulnerabilities
Same vendor: multer
V. Comments for CVE-2026-5079
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