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
Reactor Core 3.8.0 - 3.8.6
Reactor Core 3.7.19 and earlier
Metrics
Affected Vendors & Products
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Advisories
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Fixes
Solution
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Workaround
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References
| Link | Providers |
|---|---|
| https://spring.io/security/cve-2026-47863 |
|
History
Thu, 27 Aug 2026 00:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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 | |
| Title | Reactor Core bufferTimeout fair-backpressure pipeline permanently hangs when upstream delivers items during an active flush | |
| References |
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| Metrics |
cvssV3_1
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Projects
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MITRE
Status: PUBLISHED
Assigner: vmware
Published:
Updated: 2026-08-26T23:28:48.599Z
Reserved: 2026-05-20T10:00:55.157Z
Link: CVE-2026-47863
Vulnrichment
No data.
NVD
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Redhat
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OpenCVE Enrichment
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Weaknesses
No weakness.