Reactor Netty HTTP Server Denial of Service With Pipelined Requests
Priority LOW 30CWE-770Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-770.
Summary
The vulnerability occurs when a client sends HTTP/1.1 pipelined requests over a single connection, causing the Reactor Netty HTTP server to consume an excessive amount of memory. Reactor Netty 1.3.0 - 1.3.6 Reactor Netty 1.1.0 - 1.2.18 Reactor Netty 1.0.52 and earlier
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00402 34th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| VMware | Reactor Netty | 1.3.0 – 1.3.6; 1.1.0 – 1.2.18; up to 1.0.52 | — | No fix listed | CNA |
- Reactor Netty VendorVMware Affected 1.3.0 – 1.3.6; 1.1.0 – 1.2.18; up to 1.0.52 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:pivotal:reactor_netty:*:*:*:*:*:*:*:* | before 1.0.53; 1.1.0 to before 1.2.19; 1.3.0 to before 1.3.6.1 | Vulnerable | Pivotal |
- cpe:2.3:a:pivotal:reactor_netty:*:*:*:*:*:*:*:* Versions before 1.0.53; 1.1.0 to before 1.2.19; 1.3.0 to before 1.3.6.1 Vulnerable ·Pivotal
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
Not affected: 1 product
- Red Hat Fuse 7
Timeline
- 2026-10-02 Threatist record created from CVE-2026-47874
- 2026-10-03 Alias added: GHSA-fg4q-58fc-39w8
References
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Sources
- CVE-2026-47874 · CVE Program
- CVE-2026-47874 · NVD
- FIRST EPSS
- GHSA-fg4q-58fc-39w8 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-47874 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences