Spring Reactor Core vulnerabilities
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Published CVEs affecting Spring Reactor Core: 2 record(s), with affected versions and fixes.
CVE-2026-47863
High · 7.5
CWE-835 Aug 26, 2026
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
CVE-2026-47857
Medium · 5.9
CWE-190 Aug 26, 2026
Reactor Core windowTimeout fair-backpressure stream hang due to 20-bit index wrap-around
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 3.5.0 - 3.7.19
Reactor Core 3.4.41 and earlier