vulnerability · Fri 04 Sep 2026 · 11:17 UTC
CVE-2026-84428: fastify versions before 5.12.2 implement the case-insensitive nature of HTTP header names
Filed UTCSource PNJ ↗
fastify versions before 5.12.2 implement the case-insensitive nature of HTTP header names by lowercasing names in a route's header schema before compiling it, but the transformation is incomplete: it lowercases the properties keys and the root-level required array, and does not lowercase the trigger and dependent names inside the JSON Schema Draft 7 dependencies keyword. …
Signals
as the pipeline stamped them- High
- High-risk vulnerability — CVSS 7.5
CVE
KEV from CISA · EPSS from FIRST| Id | KEV | EPSS | Reference |
|---|---|---|---|
| CVE-2026-84428 | — | 0.52% | NVD ↗ |
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