CVE-2026-113872

multer is a middleware for Node.js that handles multipart/form-data file uploads. In versions from 2.0.0 before 2.5.0, when multer is configured with an asynchronous fileFilter, a single request can crash the Node.js process. If the request is aborted while one file's asynchronous fileFilter is still pending, the pending callback later resumes a parsing stream that multer has already torn down, and the underlying parser emits an error on a stream that no longer has an error listener, which Node raises as an unhandled error event so the process exits. Any application using multer with an asynchronous fileFilter is affected regardless of storage engine, while uploads using a synchronous fileFilter are not affected. The issue is fixed in multer 2.5.0, and users should upgrade to 2.5.0 or later. As a workaround, use a synchronous fileFilter.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://cna.openjsf.org/security-advisories.html
https://github.com/expressjs/multer/security/advisories/GHSA-q7qp-rjg7-q26m

Configurations

No configuration.

History

22 Oct 2026, 15:25

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-22 15:17

Updated : 2026-10-22 19:17

NVD link : CVE-2026-113872

Mitre link : CVE-2026-113872

CVE.ORG link : CVE-2026-113872

JSON object : View

Products Affected

No product.

CWE

CWE-248

Uncaught Exception

CWE-404

Improper Resource Shutdown or Release

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