Reactor Netty may incorrectly route traffic due to DNS resolver reuse
Priority LOW 17Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Will not fix Red Hat: no fix planned
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
Summary
In specific scenarios involving multiple clients with different DNS resolver configurations, Reactor Netty may incorrectly reuse a previously configured DNS resolver. 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 0.00256 17th percentileScored 2026-11-07
Fix Will not fix Red Hat: no fix planned
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- 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:broadcom:reactor_netty:*:*:*:*:*:*:*:* | before 1.0.53; 1.1.0 to before 1.2.19; 1.3.0 to before 1.3.6.1 | Vulnerable | Broadcom |
- cpe:2.3:a:broadcom: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 ·Broadcom
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Fuse 7 | Affected | No fix planned: Out of support scope |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-47843
- 2026-10-03 Alias added: GHSA-7f23-wcwg-2f8r
References
More VMware vulnerabilities
- TI-2026-42442 vCenter directory-traversal vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2024-26040 Privilege escalation in VMware vCenter Server KEVCVSS 3.1CRITICAL 9.8
- TI-2024-26039 Heap-overflow in VMware vCenter Server KEVCVSS 3.1CRITICAL 9.8
- TI-2024-24610 Out-of-bounds write in VMware vCenter Server KEVCVSS 3.1CRITICAL 9.8
- TI-2023-16914 VMware vCenter Server Out-of-Bounds Write Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2023-07303 Command injection in Aria Operations for Networks KEVCVSS 3.1CRITICAL 9.8
Sources
- CVE-2026-47843 · CVE Program
- CVE-2026-47843 · NVD
- FIRST EPSS
- GHSA-7f23-wcwg-2f8r · GitHub Advisory Database · CC BY 4.0
- CVE-2026-47843 · 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