CVE-2026-47843
Reactor Netty may incorrectly route traffic due to DNS resolver reuse
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
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Reactor Netty may incorrectly route traffic due to DNS resolver reuse
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
- Record
CVE-2026-47843- CVSS 3.1
- 3.7 Low
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
EUVDEUVD-2026-66678
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
- Record
EUVD-2026-66678- CVSS 3.1
- 3.7 Low
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-7f23-wcwg-2f8r
In specific scenarios involving multiple clients with different DNS resolver configurations,...
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
- Record
GHSA-7f23-wcwg-2f8r- CVSS 3.1
- 3.7 Low
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
NVD
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
- Record
CVE-2026-47843- CVSS 3.1
- 3.7 Low
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
OSVCLSA-2026-1791529633 No score
TuxCare security update for io.projectreactor.netty (5 CVEs)
TuxCare rebuilt 3 io.projectreactor.netty packages to address 5 CVEs. Fixed in 1.1.31-tuxcare.4.
- Record
CLSA-2026-1791529633- Updated
- 2026-11-02
OSVCLSA-2026-1791547948 No score
TuxCare security update for io.projectreactor.netty (5 CVEs)
TuxCare rebuilt 3 io.projectreactor.netty packages to address 5 CVEs. Fixed in 1.0.48-tuxcare.5.
- Record
CLSA-2026-1791547948- Updated
- 2026-11-02
Show 4 moreShow less
OSVCLSA-2026-1791989666 No score
TuxCare security update for io.projectreactor.netty (5 CVEs)
TuxCare rebuilt 3 io.projectreactor.netty packages to address 5 CVEs. Fixed in 1.2.18-tuxcare.2.
- Record
CLSA-2026-1791989666- Updated
- 2026-11-02
OSVCLSA-2026-1792505040 No score
TuxCare security update for io.projectreactor.netty (5 CVEs)
TuxCare rebuilt 3 io.projectreactor.netty packages to address 5 CVEs. Fixed in 1.0.32-tuxcare.6.
- Record
CLSA-2026-1792505040- Updated
- 2026-11-02
OSVCLSA-2026-1793116571 No score
TuxCare security update for io.projectreactor.netty (5 CVEs)
TuxCare rebuilt 3 io.projectreactor.netty packages to address 5 CVEs. Fixed in 1.1.15-tuxcare.3.
- Record
CLSA-2026-1793116571- Updated
- 2026-11-02
OSVCLSA-2026-1793345120 No score
TuxCare security update for io.projectreactor.netty (8 CVEs)
TuxCare rebuilt 4 io.projectreactor.netty packages to address 8 CVEs. Fixed in 1.0.34-tuxcare.1.
- Record
CLSA-2026-1793345120- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
io.projectreactor.netty:reactor-netty-coreTuxCare:Maven From an advisory covering 5 CVEs |
1.1.31 up to 1.1.31-tuxcare.4, plus listed versions 1.1.31-tuxcare.11.1.31-tuxcare.21.1.31-tuxcare.3 |
1.1.31-tuxcare.4 |
io.projectreactor.netty:reactor-netty-httpTuxCare:Maven From an advisory covering 5 CVEs |
1.1.31 up to 1.1.31-tuxcare.4, plus listed versions 1.1.31-tuxcare.11.1.31-tuxcare.21.1.31-tuxcare.3 |
1.1.31-tuxcare.4 |
io.projectreactor.netty:reactor-netty-http-braveTuxCare:Maven From an advisory covering 5 CVEs |
1.1.31 up to 1.1.31-tuxcare.4, plus listed versions 1.1.31-tuxcare.11.1.31-tuxcare.21.1.31-tuxcare.3 |
1.1.31-tuxcare.4 |
io.projectreactor.netty:reactor-netty-coreTuxCare:Maven From an advisory covering 5 CVEs |
1.0.48 up to 1.0.48-tuxcare.5, plus listed versions 1.0.48-tuxcare.11.0.48-tuxcare.21.0.48-tuxcare.31.0.48-tuxcare.4 |
1.0.48-tuxcare.5 |
io.projectreactor.netty:reactor-netty-httpTuxCare:Maven From an advisory covering 5 CVEs |
1.0.48 up to 1.0.48-tuxcare.5, plus listed versions 1.0.48-tuxcare.11.0.48-tuxcare.21.0.48-tuxcare.31.0.48-tuxcare.4 |
1.0.48-tuxcare.5 |
io.projectreactor.netty:reactor-netty-http-braveTuxCare:Maven From an advisory covering 5 CVEs |
1.0.48 up to 1.0.48-tuxcare.5, plus listed versions 1.0.48-tuxcare.11.0.48-tuxcare.21.0.48-tuxcare.31.0.48-tuxcare.4 |
1.0.48-tuxcare.5 |
io.projectreactor.netty:reactor-netty-coreTuxCare:Maven From an advisory covering 5 CVEs |
1.2.18 up to 1.2.18-tuxcare.2, plus listed versions 1.2.18-tuxcare.1 |
1.2.18-tuxcare.2 |
io.projectreactor.netty:reactor-netty-httpTuxCare:Maven From an advisory covering 5 CVEs |
1.2.18 up to 1.2.18-tuxcare.2, plus listed versions 1.2.18-tuxcare.1 |
1.2.18-tuxcare.2 |
io.projectreactor.netty:reactor-netty-http-braveTuxCare:Maven From an advisory covering 5 CVEs |
1.2.18 up to 1.2.18-tuxcare.2, plus listed versions 1.2.18-tuxcare.1 |
1.2.18-tuxcare.2 |
io.projectreactor.netty:reactor-netty-coreTuxCare:Maven From an advisory covering 5 CVEs |
1.0.32 up to 1.0.32-tuxcare.6, plus listed versions 1.0.32-tuxcare.11.0.32-tuxcare.21.0.32-tuxcare.31.0.32-tuxcare.41.0.32-tuxcare.5 |
1.0.32-tuxcare.6 |
Show 9 moreShow less
| Package | Affected | Fixed |
|---|---|---|
io.projectreactor.netty:reactor-netty-httpTuxCare:Maven From an advisory covering 5 CVEs |
1.0.32 up to 1.0.32-tuxcare.6, plus listed versions 1.0.32-tuxcare.11.0.32-tuxcare.21.0.32-tuxcare.31.0.32-tuxcare.41.0.32-tuxcare.5 |
1.0.32-tuxcare.6 |
io.projectreactor.netty:reactor-netty-http-braveTuxCare:Maven From an advisory covering 5 CVEs |
1.0.32 up to 1.0.32-tuxcare.6, plus listed versions 1.0.32-tuxcare.11.0.32-tuxcare.21.0.32-tuxcare.31.0.32-tuxcare.41.0.32-tuxcare.5 |
1.0.32-tuxcare.6 |
io.projectreactor.netty:reactor-netty-coreTuxCare:Maven From an advisory covering 5 CVEs |
1.1.15 up to 1.1.15-tuxcare.3, plus listed versions 1.1.15-tuxcare.11.1.15-tuxcare.2 |
1.1.15-tuxcare.3 |
io.projectreactor.netty:reactor-netty-httpTuxCare:Maven From an advisory covering 5 CVEs |
1.1.15 up to 1.1.15-tuxcare.3, plus listed versions 1.1.15-tuxcare.11.1.15-tuxcare.2 |
1.1.15-tuxcare.3 |
io.projectreactor.netty:reactor-netty-http-braveTuxCare:Maven From an advisory covering 5 CVEs |
1.1.15 up to 1.1.15-tuxcare.3, plus listed versions 1.1.15-tuxcare.11.1.15-tuxcare.2 |
1.1.15-tuxcare.3 |
io.projectreactor.netty:reactor-nettyTuxCare:Maven From an advisory covering 8 CVEs |
1.0.34 up to 1.0.34-tuxcare.1 | 1.0.34-tuxcare.1 |
io.projectreactor.netty:reactor-netty-coreTuxCare:Maven From an advisory covering 8 CVEs |
1.0.34 up to 1.0.34-tuxcare.1 | 1.0.34-tuxcare.1 |
io.projectreactor.netty:reactor-netty-httpTuxCare:Maven From an advisory covering 8 CVEs |
1.0.34 up to 1.0.34-tuxcare.1 | 1.0.34-tuxcare.1 |
io.projectreactor.netty:reactor-netty-http-braveTuxCare:Maven From an advisory covering 8 CVEs |
1.0.34 up to 1.0.34-tuxcare.1 | 1.0.34-tuxcare.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| affected | OSV | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-47843 is a low vulnerability (CVSS 3.7) in Broadcom Reactor Netty, published August 26, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.26%, the 17th percentile. No source names a fixed version.