Race Condition Affecting multer package, versions <2.3.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-MULTER-19432134
- published30 Aug 2026
- disclosed29 Aug 2026
- credit吴昊原
Introduced: 29 Aug 2026
NewCVE-2026-77063 (opens in a new tab)How to fix?
Upgrade multer to version 2.3.0 or higher.
Overview
Affected versions of this package are vulnerable to Race Condition in the fileFilter parameter. An attacker can upload files exceeding the intended size limit by exploiting a race condition when asynchronous filtering is used together with file size restrictions.