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.
No analysis available yet.
No remediation available yet.
Tracking
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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
|
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
|
Status: PUBLISHED
Assigner: openjs
Published:
Updated: 2026-06-15T16:07:45.114Z
Reserved: 2026-03-27T16:26:09.638Z
Link: CVE-2026-5038
Updated: 2026-06-15T16:07:33.955Z
Status : Analyzed
Published: 2026-06-15T16:16:34.423
Modified: 2026-06-16T16:59:41.270
Link: CVE-2026-5038
No data.
OpenCVE Enrichment
No data.
-
CWE-459
Incomplete Cleanup