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fix(deps): update dependency multer to v2 [security] - #3415
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This PR contains the following updates:
1.4.4→2.2.0Multer vulnerable to Denial of Service via unhandled exception
CVE-2025-48997 / GHSA-g5hg-p3ph-g8qg
More information
Details
Impact
A vulnerability in Multer versions >=1.4.4-lts.1, <2.0.1 allows an attacker to trigger a Denial of Service (DoS) by sending an upload file request with an empty string field name. This request causes an unhandled exception, leading to a crash of the process.
Patches
Users should upgrade to
2.0.1Workarounds
None
References
expressjs/multer@35a3272
https://github.com/expressjs/multer/issues/1233
https://github.com/expressjs/multer/pull/1256
Severity
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
Multer vulnerable to Denial of Service via unhandled exception from malformed request
CVE-2025-7338 / GHSA-fjgf-rc76-4x9p
More information
Details
Impact
A vulnerability in Multer versions >= 1.4.4-lts.1, < 2.0.2 allows an attacker to trigger a Denial of Service (DoS) by sending a malformed request. This request causes an unhandled exception, leading to a crash of the process.
Patches
Users should upgrade to
2.0.2Workarounds
None
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
Multer vulnerable to Denial of Service via incomplete cleanup
CVE-2026-3304 / GHSA-xf7r-hgr6-v32p
More information
Details
Impact
A vulnerability in Multer versions < 2.1.0 allows an attacker to trigger a Denial of Service (DoS) by sending malformed requests, potentially causing resource exhaustion.
Patches
Users should upgrade to
2.1.0Workarounds
None
Severity
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
Multer vulnerable to Denial of Service via resource exhaustion
CVE-2026-2359 / GHSA-v52c-386h-88mc
More information
Details
Impact
A vulnerability in Multer versions < 2.1.0 allows an attacker to trigger a Denial of Service (DoS) by dropping connection during file upload, potentially causing resource exhaustion.
Patches
Users should upgrade to
2.1.0Workarounds
None
Severity
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
Multer Vulnerable to Denial of Service via Uncontrolled Recursion
CVE-2026-3520 / GHSA-5528-5vmv-3xc2
More information
Details
Impact
A vulnerability in Multer versions < 2.1.1 allows an attacker to trigger a Denial of Service (DoS) by sending malformed requests, potentially causing stack overflow.
Patches
Users should upgrade to
2.1.1Workarounds
None
Resources
Severity
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
Multer vulnerable to Denial of Service via deeply nested field names
CVE-2026-5079 / GHSA-72gw-mp4g-v24j
More information
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.Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
Release Notes
expressjs/multer (multer)
v2.2.0Compare Source
v2.1.1Compare Source
v2.1.0Compare Source
defParamCharsetoption for UTF-8 filename support (#1210)v2.0.2Compare Source
v2.0.1Compare Source
v2.0.0Compare Source
Configuration
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