Bug 2524774 (CVE-2026-47857) - CVE-2026-47857 io.projectreactor/reactor-core: Reactor Core: Denial of Service via Flux.windowTimeout operator with fairBackpressure
Summary: CVE-2026-47857 io.projectreactor/reactor-core: Reactor Core: Denial of Servic...
Keywords:
Status: NEW
Alias: CVE-2026-47857
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-27 00:22 UTC by OSIDB Bzimport
Modified: 2026-09-03 11:58 UTC (History)
29 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-08-27 00:22:45 UTC 
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
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