CVE-2025-47944

Multer vulnerable to Denial of Service from maliciously crafted requests

Description

Multer is a node.js middleware for handling `multipart/form-data`. A vulnerability that is present starting in version 1.4.4-lts.1 and prior to version 2.0.0 allows an attacker to trigger a Denial of Service (DoS) by sending a malformed multi-part upload request. This request causes an unhandled exception, leading to a crash of the process. Users should upgrade to version 2.0.0 to receive a patch. No known workarounds are available.

References

Link	Tags
https://github.com/expressjs/multer/security/advisories/GHSA-4pg4-qvpc-4q3h
https://github.com/expressjs/multer/issues/1176
https://github.com/expressjs/multer/commit/2c8505f207d923dd8de13a9f93a4563e59933665

Frequently Asked Questions

What is the severity of CVE-2025-47944?: CVE-2025-47944 has been scored as a high severity vulnerability.
How to fix CVE-2025-47944?: To fix CVE-2025-47944, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-47944 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2025-47944 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-47944?: CVE-2025-47944 affects expressjs multer.

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Description

Category

CWE-248 – Uncaught Exception

References

Frequently Asked Questions