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CVE-2026-3520

HIGH

7.5

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.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published3/4/2026

Last Modified3/9/2026

Sourcenvd

Honeypot Sightings0

Affected Products

expressjs:multer

Weaknesses (CWE)

CWE-674

References

https://cna.openjsf.org/security-advisories.html(ce714d77-add3-4f53-aff5-83d477b104bb)

https://github.com/expressjs/multer/commit/7e66481f8b2e6c54b982b34c152479e096ce2752(ce714d77-add3-4f53-aff5-83d477b104bb)

https://github.com/expressjs/multer/security/advisories/GHSA-5528-5vmv-3xc2(ce714d77-add3-4f53-aff5-83d477b104bb)

https://www.cve.org/CVERecord?id=CVE-2026-3520(ce714d77-add3-4f53-aff5-83d477b104bb)

IOC Correlations

No correlations recorded

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