Always-Incorrect Control Flow Implementation Affecting @nestjs/core package, versions <11.1.17
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-NESTJSCORE-15682556
- published18 Mar 2026
- disclosed17 Mar 2026
- creditUnknown
Introduced: 17 Mar 2026
NewCVE-2026-33011 (opens in a new tab)How to fix?
Upgrade @nestjs/core to version 11.1.17 or higher.
Overview
@nestjs/core is a Nest - modern, fast, powerful node.js web framework (@core)
Affected versions of this package are vulnerable to Always-Incorrect Control Flow Implementation when handling a @nestjs/platform-fastify HEAD request. An attacker can bypass middleware logic by sending malicious requests, which are redirected to GET handlers by fastify by default.