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+---
+title: June 2025 Security Releases
+description: Security update for Multer released. All users are encouraged to upgrade.
+tags: security vulnerabilities
+authors:
+  - name: Ulises Gascón
+    github: UlisesGascon
+---
+
+The Express team has released a new patch version of [Multer](https://www.npmjs.com/package/multer), addressing a high-severity vulnerability that could lead to a Denial of Service (DoS) attack.
+
+{% include admonitions/warning.html 
+content="We strongly recommend that all users upgrade to Multer v2.0.1 or later immediately."
+%}
+
+This release addresses the following vulnerability:
+
+### High severity vulnerability CVE-2025-48997 in Multer middleware
+
+**[Multer](https://www.npmjs.com/package/multer) versions `>=1.4.4-lts.1` and `<2.0.1` are vulnerable to a Denial of Service (DoS) attack.**
+
+An attacker can trigger this vulnerability by sending an upload request with an empty string as the field name. This malformed request causes an unhandled exception, leading to a crash of the server process.
+
+**Affected versions**: `>=1.4.4-lts.1` and `<2.0.1`  
+**Patched version**: `2.0.1`
+
+For more details, see [GHSA-g5hg-p3ph-g8qg](https://github.com/expressjs/multer/security/advisories/GHSA-g5hg-p3ph-g8qg).
+
+