Description
Impact: multer versions 2.0.0-alpha.1 through 2.1.1 and 3.0.0-alpha.1 are vulnerable to a Denial of Service when using diskStorage. Aborted or malformed multipart uploads leave orphaned partial files on disk because the Readable.pipe() call does not propagate the stream destroy signal to
the underlying fs.WriteStream. An attacker can exhaust disk space by triggering many aborted uploads, with no application bug required.

Patches: Users should upgrade to multer 2.2.0 (2.x line) or 3.0.0-alpha.2 (3.x prerelease). Both versions track in-flight write streams and clean them up on the abort path.

Workarounds: None.
Published: 2026-06-15
Score: 5.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-3p4h-7m6x-2hcm Multer vulnerable to Denial of Service via incomplete cleanup of aborted uploads
History

Tue, 23 Jun 2026 21:30:00 +0000

Type Values Removed Values Added
First Time appeared Multer
Multer multer
Vendors & Products Multer
Multer multer

Tue, 16 Jun 2026 17:00:00 +0000

Type Values Removed Values Added
First Time appeared Expressjs
Expressjs multer
CPEs cpe:2.3:a:expressjs:multer:*:*:*:*:*:node.js:*:*
cpe:2.3:a:expressjs:multer:3.0.0:alpha1:*:*:*:node.js:*:*
Vendors & Products Expressjs
Expressjs multer

Mon, 15 Jun 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 15 Jun 2026 16:00:00 +0000

Type Values Removed Values Added
Description Impact: multer versions 2.0.0-alpha.1 through 2.1.1 and 3.0.0-alpha.1 are vulnerable to a Denial of Service when using diskStorage. Aborted or malformed multipart uploads leave orphaned partial files on disk because the Readable.pipe() call does not propagate the stream destroy signal to the underlying fs.WriteStream. An attacker can exhaust disk space by triggering many aborted uploads, with no application bug required. Patches: Users should upgrade to multer 2.2.0 (2.x line) or 3.0.0-alpha.2 (3.x prerelease). Both versions track in-flight write streams and clean them up on the abort path. Workarounds: None.
Title multer vulnerable to Denial of Service via incomplete cleanup of aborted uploads
Weaknesses CWE-459
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}


cve-icon MITRE

Status: PUBLISHED

Assigner: openjs

Published:

Updated: 2026-06-15T16:07:45.114Z

Reserved: 2026-03-27T16:26:09.638Z

Link: CVE-2026-5038

cve-icon Vulnrichment

Updated: 2026-06-15T16:07:33.955Z

cve-icon NVD

Status : Analyzed

Published: 2026-06-15T16:16:34.423

Modified: 2026-06-16T16:59:41.270

Link: CVE-2026-5038

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-23T21:08:57Z

Weaknesses