Multer vulnerable to Denial of Service via resource exhaustion

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Summary

CVECVE-2026-2359
StatePUBLISHED
Assigneropenjs
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-02-27 16:16:25 UTC
Updated2026-06-30 03:18:12 UTC
DescriptionMulter is a node.js middleware for handling `multipart/form-data`. A vulnerability in Multer prior to version 2.1.0 allows an attacker to trigger a Denial of Service (DoS) by dropping connection during file upload, potentially causing resource exhaustion. Users should upgrade to version 2.1.0 to receive a patch. No known workarounds are available.

Risk And Classification

Primary CVSS: v4.0 8.7 HIGH from ce714d77-add3-4f53-aff5-83d477b104bb

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS: 0.006630000 probability, percentile 0.471780000 (date 2026-07-02)

Problem Types: CWE-772 | CWE-772 CWE-772 | CWE-772 Missing Release of Resource after Effective Lifetime

VersionSourceTypeScoreSeverityVector
4.0ce714d77-add3-4f53-aff5-83d477b104bbSecondary8.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/C...
4.0CNACVSS8.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
3.1[email protected]Primary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1ADPCVSS7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.10b0ca135-0b70-47e7-9f44-1890c2a1c46cSecondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
None
Availability
High
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Expressjs Multer All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Expressjs Multer affected 0.0.0 2.1.0 semver Not specified
ADP Red Hat Red Hat Developer Hub 1.8 Not specified Not specified
ADP Red Hat Red Hat Developer Hub 1.9 Not specified Not specified
ADP Red Hat Self-service Automation Portal 2 Not specified Not specified
ADP Red Hat Logging Subsystem For Red Hat OpenShift Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux 10 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux 7 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux 8 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux 9 Not specified Not specified
ADP Red Hat Red Hat Trusted Profile Analyzer Not specified Not specified

References

ReferenceSourceLinkTags
cna.openjsf.org/security-advisories.html ce714d77-add3-4f53-aff5-83d477b104bb cna.openjsf.org Vendor Advisory
bugzilla.redhat.com/show_bug.cgi 0b0ca135-0b70-47e7-9f44-1890c2a1c46c bugzilla.redhat.com
access.redhat.com/security/cve/CVE-2026-2359 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
www.cve.org/CVERecord ce714d77-add3-4f53-aff5-83d477b104bb www.cve.org VDB Entry
access.redhat.com/errata/RHSA-2026:6802 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
github.com/expressjs/multer/security/advisories/GHSA-v52c-386h-88mc ce714d77-add3-4f53-aff5-83d477b104bb github.com Patch, Vendor Advisory
access.redhat.com/errata/RHSA-2026:6174 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2359.json 0b0ca135-0b70-47e7-9f44-1890c2a1c46c security.access.redhat.com
github.com/expressjs/multer/commit/cccf0fe0e64150c4f42ccf6654165c0d66b9adab ce714d77-add3-4f53-aff5-83d477b104bb github.com Patch
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

SourceTimeEvent
ADP2026-02-27T16:01:27.340ZReported to Red Hat.
ADP2026-02-27T15:42:08.088ZMade public.

Solutions

ADP: RHSA-2026:6174: Red Hat Developer Hub 1.8

ADP: RHSA-2026:6802: Red Hat Developer Hub 1.9

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