Multer vulnerable to Denial of Service via unhandled exception
### Impact A vulnerability in Multer versions >=1.4.4-lts.1, <2.0.1 allows an attacker to trigger a Denial of Service (DoS) by sending an upload file request with an empty string field name. This request causes an unhandled exception, leading to a crash of the process. ### Patches Users should upgrade to `2.0.1` ### Workarounds None ### References https://github.com/expressjs/multer/commit/35a3272b611945155e046dd5cef11088587635e9 https://github.com/expressjs/multer/issues/1233 https://github.com/expressjs/multer/pull/1256
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2025-48997US | — | — | ||
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 2.0.1 allows an attacker to… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/expressjs/multerPACKAGE
- https://github.com/expressjs/multer/commit/35a3272b611945155e046dd5cef11088587635e9WEB
- https://github.com/expressjs/multer/issues/1233WEB
- https://github.com/expressjs/multer/pull/1256WEB
- https://github.com/expressjs/multer/security/advisories/GHSA-g5hg-p3ph-g8qgWEB
- https://nvd.nist.gov/vuln/detail/CVE-2025-48997ADVISORY
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