CVE-2026-2359
Multer vulnerable to Denial of Service via resource exhaustion
Description
Multer 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.
INFO
Published Date :
Feb. 27, 2026, 4:16 p.m.
Last Modified :
June 30, 2026, 3:18 a.m.
Remotely Exploit :
Yes !
Source :
ce714d77-add3-4f53-aff5-83d477b104bb
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | ||||
| CVSS 4.0 | HIGH | ce714d77-add3-4f53-aff5-83d477b104bb | ||||
| CVSS 4.0 | HIGH | ce714d77-add3-4f53-aff5-83d477b104bb |
Solution
- Upgrade Multer to version 2.1.0.
- Apply the latest security patches for Multer.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-2359.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-2359 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-2359
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-2359 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-2359 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Jun. 30, 2026
Action Type Old Value New Value Added Affected [{'cpes': ['cpe:/a:redhat:rhdh:1.8::el9'], 'vendor': 'Red Hat', 'product': 'Red Hat Developer Hub 1.8', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:rhdh:1.9::el9'], 'vendor': 'Red Hat', 'product': 'Red Hat Developer Hub 1.9', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:ansible_portal:2'], 'vendor': 'Red Hat', 'product': 'Self-service automation portal 2', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:logging:5'], 'vendor': 'Red Hat', 'product': 'Logging Subsystem for Red Hat OpenShift', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/o:redhat:enterprise_linux:10'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 10', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/o:redhat:enterprise_linux:7'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 7', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/o:redhat:enterprise_linux:8'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 8', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/o:redhat:enterprise_linux:9'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 9', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:trusted_profile_analyzer:2'], 'vendor': 'Red Hat', 'product': 'Red Hat Trusted Profile Analyzer', 'defaultStatus': 'unaffected'}] Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-772 Added Reference https://access.redhat.com/errata/RHSA-2026:6174 Added Reference https://access.redhat.com/errata/RHSA-2026:6802 Added Reference https://access.redhat.com/security/cve/CVE-2026-2359 Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2443350 Added Reference https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2359.json -
CVE Modified by ce714d77-add3-4f53-aff5-83d477b104bb
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'expressjs', 'product': 'multer', 'versions': [{'status': 'affected', 'version': '0.0.0', 'lessThan': '2.1.0', 'versionType': 'semver'}], 'packageURL': 'pkg:npm/multer', 'defaultStatus': 'unaffected'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-2359', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-02-27T17:13:07.689391Z'} -
Initial Analysis by [email protected]
Mar. 19, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CPE Configuration OR *cpe:2.3:a:expressjs:multer:*:*:*:*:*:node.js:*:* versions up to (excluding) 2.1.0 Added Reference Type openjs: https://cna.openjsf.org/security-advisories.html Types: Vendor Advisory Added Reference Type openjs: https://github.com/expressjs/multer/commit/cccf0fe0e64150c4f42ccf6654165c0d66b9adab Types: Patch Added Reference Type openjs: https://github.com/expressjs/multer/security/advisories/GHSA-v52c-386h-88mc Types: Patch, Vendor Advisory Added Reference Type openjs: https://www.cve.org/CVERecord?id=CVE-2026-2359 Types: VDB Entry -
New CVE Received by ce714d77-add3-4f53-aff5-83d477b104bb
Feb. 27, 2026
Action Type Old Value New Value Added Description Multer 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. Added CVSS V4.0 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 Added CWE CWE-772 Added Reference https://cna.openjsf.org/security-advisories.html Added Reference https://github.com/expressjs/multer/commit/cccf0fe0e64150c4f42ccf6654165c0d66b9adab Added Reference https://github.com/expressjs/multer/security/advisories/GHSA-v52c-386h-88mc Added Reference https://www.cve.org/CVERecord?id=CVE-2026-2359