high8.7
CVE-2026-3304
Multer vulnerable to Denial of Service via incomplete cleanup
Impact
### 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 `2.1.0` ### Workarounds None
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | multer | < 2.1.0 | 2.1.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Expressjs | Multer | before 2.1.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://cna.openjsf.org/security-advisories.html
- https://github.com/expressjs/multer/commit/739919097dde3921ec31b930e4b9025036fa74ee
- https://github.com/expressjs/multer/security/advisories/GHSA-xf7r-hgr6-v32p
- https://www.cve.org/CVERecord?id=CVE-2026-3304
- https://access.redhat.com/errata/RHSA-2026:6174
- https://access.redhat.com/errata/RHSA-2026:6802
- https://access.redhat.com/security/cve/CVE-2026-3304
- https://bugzilla.redhat.com/show_bug.cgi?id=2443353
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3304.json
- https://github.com/advisories/GHSA-xf7r-hgr6-v32p
- https://nvd.nist.gov/vuln/detail/CVE-2026-3304