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CVE-2026-47857 Reactor Core windowTimeout fair-backpressure stream hang due to 20-bit index wrap-around

🗓️ 26 Aug 2026 23:28:44Reported by vmwareType 
cvelist
 cvelist
🔗 www.cve.org👁 2 Views

Flux.windowTimeout fair-backpressure DoS in Reactor Core 3.4.41-3.8.6 from index wrap-around.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
cve
CVE
CVE-2026-47857
26 Aug 202623:28
cve
nvd
NVD
CVE-2026-47857
27 Aug 202601:17
nvd
ptsecurity
Positive Technologies
PT-2026-82352
26 Aug 202600:00
ptsecurity
spring
Spring Security Advisories
cve-2026-47857 - MEDIUM - Reactor Core windowTimeout fair-backpressure stream hang due to 20-bit index wrap-around
20 Aug 202600:00
spring
[
  {
    "vendor": "Spring",
    "product": "Reactor Core",
    "versions": [
      {
        "status": "affected",
        "version": "3.8.0",
        "lessThanOrEqual": "3.8.6",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "3.5.0",
        "lessThanOrEqual": "3.7.19",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "0",
        "lessThanOrEqual": "3.4.41",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

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