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Vulnerability DatabaseCVE-2026-2880
CVE-2026-2880:
JavaScript vulnerability analysis and mitigation
A vulnerability in @fastify/middie versions < 9.2.0 can result in authentication/authorization bypass when using path-scoped middleware (for example, app.use('/secret', auth)).
When Fastify router normalization options are enabled (such as ignoreDuplicateSlashes, useSemicolonDelimiter, and related trailing-slash behavior), crafted request paths may bypass middleware checks while still being routed to protected handlers.
Source: NVD
Related JavaScript vulnerabilities:
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