Allocation of Resources Without Limits or Throttling Affecting io.projectreactor:reactor-core package, versions [,3.8.7)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published26 Aug 2026
- disclosed20 Aug 2026
- creditUnknown
Introduced: 20 Aug 2026
NewCVE-2026-47857 (opens in a new tab)How to fix?
Upgrade io.projectreactor:reactor-core to version 3.8.7 or higher.
Overview
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the Flux.windowTimeout function when fairBackpressure is enabled. An attacker can cause the stream to hang indefinitely and exhaust system resources by maintaining long-lived connections and manipulating downstream read speeds.