Broadcom Reactor Core vulnerabilities

2 CVEs affecting Broadcom Reactor Core, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2026-47863, published 2026-08-27.

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Known exploited (CISA KEV) first, then by EPSS exploit probability.

• CVE-2026-47863, published 2026-08-27. High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days. 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…
• CVE-2026-47857, published 2026-08-27. Medium severity, CVSS 5.9. EPSS: 0.4% chance of exploitation in the next 30 days. In Reactor Core, applications that use the Flux.windowTimeout operator with fairBackpressure enabled are vulnerable to a Denial of Service (DoS) condition. Reactor Core 3.8.0 - 3.8.6 Reactor Core…