Unrated severityNVD Advisory· Published Aug 26, 2026
Reactor Core bufferTimeout fair-backpressure pipeline permanently hangs when upstream delivers items during an active flush
CVE-2026-47863
Description
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
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Affected products
1- Range: 3.8.0 - 3.8.6, 3.7.19 and earlier
Patches
Vulnerability mechanics
References
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