[GHSA] GHSA-x424-64qh-5j54 (high) — react/http: A malformed HTTP chunked body can lead to a denial-of-service and peg the CPU

GHSA-x424-64qh-5j54 Severity: high CVE: CVE-2026-84997

react/http: A malformed HTTP chunked body can lead to a denial-of-service and peg the CPU

### Summary

A malformed HTTP message using `Transfer-Encoding: chunked` can drive `React\Http\Io\ChunkedDecoder` into an infinite loop, pegging a CPU core and freezing the event loop. Because ReactPHP is single-threaded, one such message stalls the ent