High severity7.5NVD Advisory· Published Mar 4, 2026· Updated Jul 15, 2026
CVE-2026-3520
CVE-2026-3520
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
multernpm | < 2.1.1 | 2.1.1 |
Affected products
5- osv-coords3 versions
< 0.8.2-r7+ 2 more
- (no CPE)range: < 0.8.2-r7
- (no CPE)range: < 3.2.0-r1
- (no CPE)range: < 2.1.1
Patches
Vulnerability mechanics
References
11- github.com/expressjs/multer/commit/7e66481f8b2e6c54b982b34c152479e096ce2752nvdPatchWEB
- cna.openjsf.org/security-advisories.htmlnvdThird Party AdvisoryWEB
- github.com/advisories/GHSA-5528-5vmv-3xc2ghsaADVISORY
- github.com/expressjs/multer/security/advisories/GHSA-5528-5vmv-3xc2nvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-3520ghsaADVISORY
- www.cve.org/CVERecordnvdThird Party AdvisoryWEB
- access.redhat.com/errata/RHSA-2026:6174nvd
- access.redhat.com/errata/RHSA-2026:6802nvd
- access.redhat.com/security/cve/CVE-2026-3520nvd
- bugzilla.redhat.com/show_bug.cginvd
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3520.jsonnvd
News mentions
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