CVE-2026-47863

A flaw was found in Reactor Core. Applications using the Flux.bufferTimeout operator with fairBackpressure enabled are vulnerable to a Denial of Service DoS condition. This occurs when upstream components deliver items during an active flush, causing the processing pipeline to permanently hang an...

CVE-2026-47863 Reactor Core bufferTimeout fair-backpressure pipeline permanently hangs when upstream delivers items during an active flush

In Reactor Core, applications that use the Flux.bufferTimeout operator with fairBackpressure enabled are vulnerable to a Denial of Service DoS condition. Reactor Core 3.8.0 - 3.8.6 Reactor Core 3.7.19 and earlier...