CVE-2026-5038

highpriority · track · 30EPSS 0.004 · 30 %ileDEEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.37% (30th) EPSS

CVSS 7.5 · high

Is it mine?

11 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.3–7.5

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · ENISA EU

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondaryexploitability 3.9 · impact 1.4

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · OSV

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-459USCWE-459US

affected products (11)

Products and version ranges known to be affected.

IBM QRadar SIEMall versionscert_bundDEcpe:/a:ibm:qradar_siem:-
Oracle Linuxall versionscert_bundDEcpe:/o:oracle:linux:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
IBM App Connect Enterprise< 12.0.12.28cert_bundDE
IBM App Connect Enterprise< 13.0.8.0cert_bundDE
multer multer2.0.0-alpha.1 → 2.2.0enisa_euvdEU
multer multer3.0.0-alpha.1 → 3.0.0-alpha.2enisa_euvdEU
expressjs multer2.0.0 → 2.2.0nvdUScpe:2.3:a:expressjs:multer:*:*:*:*:*:*:*:*
expressjs multer= 3.0.0nvdUScpe:2.3:a:expressjs:multer:*:*:*:*:*:*:*:*
npm multer2.0.0-alpha.1 → 2.2.0osvUSpkg:npm/multer
npm multer3.0.0-alpha.1 → 3.0.0-alpha.2osvUSpkg:npm/multer

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-2488IBM App Connect Enterprise: Mehrere SchwachstellenDeutsch2026-07-22csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in IBM App Connect Enterprise ausnutzen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, um Dateien zu manipulieren, um einen Cross-Site Scripting Angriff durchzuführen, und um Sicherheitsvorkehrungen zu umgehen.
GHSA-3p4h-7m6x-2hcmMulter vulnerable to Denial of Service via incomplete cleanup of aborted uploads2026-06-17ghsa · osvUS
### Impact A vulnerability in Multer allows an attacker to trigger a Denial of Service (DoS) by aborting or sending malformed multipart uploads, causing orphaned partial files to accumulate on disk when using diskStorage. ### Patches Users should upgrade to `2.2.0`, `3.0.0-alpha.2` or higher ### Workarounds None

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd osv NVD CVE.org MITRE

published 2026-06-15modified 2026-06-17

references (6)

External citations — patches, advisories, analysis.

scry

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