GHSA-72gw-mp4g-v24j
Suggest an improvement- Source
- https://github.com/advisories/GHSA-72gw-mp4g-v24j
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-72gw-mp4g-v24j/GHSA-72gw-mp4g-v24j.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-72gw-mp4g-v24j
- Aliases
-
- CVE-2026-5079
- Downstream
- Published
- 2026-06-17T18:12:27Z
- Modified
- 2026-06-17T18:15:11.245203508Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- Multer vulnerable to Denial of Service via deeply nested field names
- Details
-
Impact
Multer is vulnerable to a Denial of Service (DoS) via deeply nested field names in multipart form data. The
append-fielddependency parses bracket notation in field names (e.g.,a[b][c]) 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
2.2.0and configurelimits.fieldNestingDepthto the minimum depth their application requires.Workarounds
Set
limits.fieldsto 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. - Database specific
{ "github_reviewed_at": "2026-06-17T18:12:27Z", "nvd_published_at": "2026-06-15T14:16:37Z", "github_reviewed": true, "cwe_ids": [ "CWE-400" ], "severity": "HIGH" }- References
Affected packages
npm / multer
Package
- Name
- multer
- View open source insights on deps.dev
- Purl
- pkg:npm/multer
npm / multer
Package
- Name
- multer
- View open source insights on deps.dev
- Purl
- pkg:npm/multer