CVE-2026-47857
Last modified
CVE-2026-47857 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. 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. EPSS estimates a 0.22% chance of exploitation in the next 30 days.
Description
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
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Broadcom | Reactor Core | < 3.4.42 |
| Broadcom | Reactor Core | >= 3.5.0, < 3.7.20 |
| Broadcom | Reactor Core | >= 3.8.0, < 3.8.6.1 |
References
- https://spring.io/security/cve-2026-47857Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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