CVE-2026-3520

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Source
https://cve.org/CVERecord?id=CVE-2026-3520
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-3520.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-3520
Aliases
Downstream
CGA (4)
ECHO (1)
MINI (1)
ROOT (1)
Published
2026-03-04T16:17:18Z
Modified
2026-10-28T02:30:21Z
Severity
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Multer vulnerable to Denial of Service via uncontrolled recursion
Details

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.

Database specific 
{
    "cna_assigner": "openjs",
    "cwe_ids": [
        "CWE-674"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3520.json"
}
References

Affected packages

Git / github.com/expressjs/multer

Affected ranges

Type
GIT
Repo
https://github.com/expressjs/multer
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
368c8a10cca11854cf17c24029fefd1eafb1c059
Fixed
7e66481f8b2e6c54b982b34c152479e096ce2752
Database specific
Show details 
{
    "extracted_events": [
        {
            "cpe": "cpe:2.3:a:expressjs:multer:*:*:*:*:*:node.js:*:*",
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "2.1.1"
                }
            ],
            "source": "CPE_RANGE"
        },
        {
            "range": [
                {
                    "fixed": "7e66481f8b2e6c54b982b34c152479e096ce2752"
                }
            ],
            "source": "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

v1.*
v1.0.0
v1.0.1
v1.0.2
v1.0.3
v1.0.4
v1.0.5
v1.0.6
v1.1.0
v1.2.0
v1.2.1
v1.3.0
v1.3.1
v1.4.0
v1.4.1
v1.4.2
v1.4.3
v1.4.4
v1.4.4-lts.1
v1.4.5-lts.1
v1.4.5-lts.2
v2.*
v2.0.0
v2.0.1
v2.0.2
v2.1.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-3520.json"