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CVE-2026-47844

Reactor Netty HTTP Server Leaks Exception Details

5.3 Medium

In specific scenarios, the Reactor Netty HTTP Server may leak exception details across unrelated requests. In order for this to happen, the server must be configured with Brave Tracing. 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: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: Low
Availability: None

Exploit likelihood

0.24%Up 0.1 points since Aug 27, 2026

What each source reports

CVE List Score used 5.3

Reactor Netty HTTP Server Leaks Exception Details

In specific scenarios, the Reactor Netty HTTP Server may leak exception details across unrelated requests. In order for this to happen, the server must be configured with Brave Tracing. 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-2026-47844
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Updated: 2026-11-02

EUVDEUVD-2026-66679 5.3

In specific scenarios, the Reactor Netty HTTP Server may leak exception details across unrelated requests. In order for this to happen, the server must be configured with Brave Tracing. 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-2026-66679
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-xcw7-34p4-wrp4 5.3

In specific scenarios, the Reactor Netty HTTP Server may leak exception details across unrelated...

In specific scenarios, the Reactor Netty HTTP Server may leak exception details across unrelated requests. In order for this to happen, the server must be configured with Brave Tracing. 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-xcw7-34p4-wrp4
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Updated: 2026-11-02

NVD 5.3

In specific scenarios, the Reactor Netty HTTP Server may leak exception details across unrelated requests. In order for this to happen, the server must be configured with Brave Tracing. 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-2026-47844
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS 3.1: 3.7 LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/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

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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

Affected packages
Package	Affected	Fixed
`io.projectreactor.netty:reactor-netty-core` TuxCare: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` TuxCare: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-brave` TuxCare: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-core` TuxCare: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` TuxCare: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-brave` TuxCare: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-core` TuxCare: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` TuxCare: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-brave` TuxCare: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-core` TuxCare: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

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Affected packages
Package	Affected	Fixed
`io.projectreactor.netty:reactor-netty-http` TuxCare: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-brave` TuxCare: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-core` TuxCare: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` TuxCare: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-brave` TuxCare: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` TuxCare: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-core` TuxCare: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` TuxCare: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-brave` TuxCare:Maven From an advisory covering 8 CVEs	1.0.34 up to 1.0.34-tuxcare.1	1.0.34-tuxcare.1

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 2, 2026	affected, aliases, products, published	EUVD, OSV
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-47844 is a medium vulnerability (CVSS 5.3) 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 0.24%, the 15th percentile. No source names a fixed version.

References