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Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2026-47863

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

Exploit prediction scoring system (EPSS) score

EPSS Score 0.002

EPSS Ranking 12.7%

CVSS Severity

CVSS v3 Score 5.9

References

https://spring.io/security/cve-2026-47863

Products affected by CVE-2026-47863

Broadcom » Reactor Core » Version: 3.5.10

cpe:2.3:a:broadcom:reactor_core:3.5.10
Broadcom » Reactor Core » Version: 3.5.11

cpe:2.3:a:broadcom:reactor_core:3.5.11
Broadcom » Reactor Core » Version: 3.5.12

cpe:2.3:a:broadcom:reactor_core:3.5.12
Broadcom » Reactor Core » Version: 3.5.13

cpe:2.3:a:broadcom:reactor_core:3.5.13
Broadcom » Reactor Core » Version: 3.5.14

cpe:2.3:a:broadcom:reactor_core:3.5.14
Broadcom » Reactor Core » Version: 3.5.15

cpe:2.3:a:broadcom:reactor_core:3.5.15
Broadcom » Reactor Core » Version: 3.5.16

cpe:2.3:a:broadcom:reactor_core:3.5.16
Broadcom » Reactor Core » Version: 3.5.17

cpe:2.3:a:broadcom:reactor_core:3.5.17
Broadcom » Reactor Core » Version: 3.5.18

cpe:2.3:a:broadcom:reactor_core:3.5.18
Broadcom » Reactor Core » Version: 3.5.19

cpe:2.3:a:broadcom:reactor_core:3.5.19
Broadcom » Reactor Core » Version: 3.5.20

cpe:2.3:a:broadcom:reactor_core:3.5.20
Broadcom » Reactor Core » Version: 3.5.7

cpe:2.3:a:broadcom:reactor_core:3.5.7
Broadcom » Reactor Core » Version: 3.5.8

cpe:2.3:a:broadcom:reactor_core:3.5.8
Broadcom » Reactor Core » Version: 3.5.9

cpe:2.3:a:broadcom:reactor_core:3.5.9
Broadcom » Reactor Core » Version: 3.6.0

cpe:2.3:a:broadcom:reactor_core:3.6.0
Broadcom » Reactor Core » Version: 3.6.1

cpe:2.3:a:broadcom:reactor_core:3.6.1
Broadcom » Reactor Core » Version: 3.6.10

cpe:2.3:a:broadcom:reactor_core:3.6.10
Broadcom » Reactor Core » Version: 3.6.11

cpe:2.3:a:broadcom:reactor_core:3.6.11
Broadcom » Reactor Core » Version: 3.6.12

cpe:2.3:a:broadcom:reactor_core:3.6.12
Broadcom » Reactor Core » Version: 3.6.13

cpe:2.3:a:broadcom:reactor_core:3.6.13
Broadcom » Reactor Core » Version: 3.6.14

cpe:2.3:a:broadcom:reactor_core:3.6.14
Broadcom » Reactor Core » Version: 3.6.15

cpe:2.3:a:broadcom:reactor_core:3.6.15
Broadcom » Reactor Core » Version: 3.6.16

cpe:2.3:a:broadcom:reactor_core:3.6.16
Broadcom » Reactor Core » Version: 3.6.17

cpe:2.3:a:broadcom:reactor_core:3.6.17
Broadcom » Reactor Core » Version: 3.6.18

cpe:2.3:a:broadcom:reactor_core:3.6.18
Broadcom » Reactor Core » Version: 3.6.2

cpe:2.3:a:broadcom:reactor_core:3.6.2
Broadcom » Reactor Core » Version: 3.6.3

cpe:2.3:a:broadcom:reactor_core:3.6.3
Broadcom » Reactor Core » Version: 3.6.4

cpe:2.3:a:broadcom:reactor_core:3.6.4
Broadcom » Reactor Core » Version: 3.6.5

cpe:2.3:a:broadcom:reactor_core:3.6.5
Broadcom » Reactor Core » Version: 3.6.6

cpe:2.3:a:broadcom:reactor_core:3.6.6
Broadcom » Reactor Core » Version: 3.6.7

cpe:2.3:a:broadcom:reactor_core:3.6.7
Broadcom » Reactor Core » Version: 3.6.8

cpe:2.3:a:broadcom:reactor_core:3.6.8
Broadcom » Reactor Core » Version: 3.6.9

cpe:2.3:a:broadcom:reactor_core:3.6.9
Broadcom » Reactor Core » Version: 3.7.0

cpe:2.3:a:broadcom:reactor_core:3.7.0
Broadcom » Reactor Core » Version: 3.7.1

cpe:2.3:a:broadcom:reactor_core:3.7.1
Broadcom » Reactor Core » Version: 3.7.10

cpe:2.3:a:broadcom:reactor_core:3.7.10
Broadcom » Reactor Core » Version: 3.7.11

cpe:2.3:a:broadcom:reactor_core:3.7.11
Broadcom » Reactor Core » Version: 3.7.12

cpe:2.3:a:broadcom:reactor_core:3.7.12
Broadcom » Reactor Core » Version: 3.7.13

cpe:2.3:a:broadcom:reactor_core:3.7.13
Broadcom » Reactor Core » Version: 3.7.14

cpe:2.3:a:broadcom:reactor_core:3.7.14
Broadcom » Reactor Core » Version: 3.7.15

cpe:2.3:a:broadcom:reactor_core:3.7.15
Broadcom » Reactor Core » Version: 3.7.16

cpe:2.3:a:broadcom:reactor_core:3.7.16
Broadcom » Reactor Core » Version: 3.7.17

cpe:2.3:a:broadcom:reactor_core:3.7.17
Broadcom » Reactor Core » Version: 3.7.18

cpe:2.3:a:broadcom:reactor_core:3.7.18
Broadcom » Reactor Core » Version: 3.7.19

cpe:2.3:a:broadcom:reactor_core:3.7.19
Broadcom » Reactor Core » Version: 3.7.2

cpe:2.3:a:broadcom:reactor_core:3.7.2
Broadcom » Reactor Core » Version: 3.7.3

cpe:2.3:a:broadcom:reactor_core:3.7.3
Broadcom » Reactor Core » Version: 3.7.4

cpe:2.3:a:broadcom:reactor_core:3.7.4
Broadcom » Reactor Core » Version: 3.7.5

cpe:2.3:a:broadcom:reactor_core:3.7.5
Broadcom » Reactor Core » Version: 3.7.6

cpe:2.3:a:broadcom:reactor_core:3.7.6
Broadcom » Reactor Core » Version: 3.7.7

cpe:2.3:a:broadcom:reactor_core:3.7.7
Broadcom » Reactor Core » Version: 3.7.8

cpe:2.3:a:broadcom:reactor_core:3.7.8
Broadcom » Reactor Core » Version: 3.7.9

cpe:2.3:a:broadcom:reactor_core:3.7.9
Broadcom » Reactor Core » Version: 3.8.0

cpe:2.3:a:broadcom:reactor_core:3.8.0
Broadcom » Reactor Core » Version: 3.8.1

cpe:2.3:a:broadcom:reactor_core:3.8.1
Broadcom » Reactor Core » Version: 3.8.2

cpe:2.3:a:broadcom:reactor_core:3.8.2
Broadcom » Reactor Core » Version: 3.8.3

cpe:2.3:a:broadcom:reactor_core:3.8.3
Broadcom » Reactor Core » Version: 3.8.4

cpe:2.3:a:broadcom:reactor_core:3.8.4
Broadcom » Reactor Core » Version: 3.8.5

cpe:2.3:a:broadcom:reactor_core:3.8.5
Broadcom » Reactor Core » Version: 3.8.6

cpe:2.3:a:broadcom:reactor_core:3.8.6

Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2026-47863

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