CVE-2023-34054
Reactor Netty HTTP Server Metrics DoS Vulnerability
In Reactor Netty HTTP Server, versions 1.1.x prior to 1.1.13 and versions 1.0.x prior to 1.0.39, it is possible for a user to provide specially crafted HTTP requests that may cause a denial-of-service (DoS) condition.
Specifically, an application is vulnerable if Reactor Netty HTTP Server built-in integration with Micrometer is enabled.
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
- None
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Reactor Netty HTTP Server Metrics DoS Vulnerability
In Reactor Netty HTTP Server, versions 1.1.x prior to 1.1.13 and versions 1.0.x prior to 1.0.39, it is possible for a user to provide specially crafted HTTP requests that may cause a denial-of-service (DoS) condition.
Specifically, an application is vulnerable if Reactor Netty HTTP Server built-in integration with Micrometer is enabled.
- Record
CVE-2023-34054- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - Updated
- 2026-11-02
EUVDEUVD-2023-3013
In Reactor Netty HTTP Server, versions 1.1.x prior to 1.1.13 and versions 1.0.x prior to 1.0.39, it is possible for a user to provide specially crafted HTTP requests that may cause a denial-of-service (DoS) condition.
Specifically, an application is vulnerable if Reactor Netty HTTP Server built-in integration with Micrometer is enabled.
- Record
EUVD-2023-3013- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-q24v-hpg3-v3jp
Reactor Netty HTTP Server denial of service vulnerability
In Reactor Netty HTTP Server, versions 1.1.x prior to 1.1.13 and versions 1.0.x prior to 1.0.39, it is possible for a user to provide specially crafted HTTP requests that may cause a denial-of-service (DoS) condition.
Specifically, an application is vulnerable if Reactor Netty HTTP Server built-in integration with Micrometer is enabled.
- Record
GHSA-q24v-hpg3-v3jp- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
NVD
In Reactor Netty HTTP Server, versions 1.1.x prior to 1.1.13 and versions 1.0.x prior to 1.0.39, it is possible for a user to provide specially crafted HTTP requests that may cause a denial-of-service (DoS) condition.
Specifically, an application is vulnerable if Reactor Netty HTTP Server built-in integration with Micrometer is enabled.
- Record
CVE-2023-34054- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSV
Reactor Netty HTTP Server Metrics DoS Vulnerability
In Reactor Netty HTTP Server, versions 1.1.x prior to 1.1.13 and versions 1.0.x prior to 1.0.39, it is possible for a user to provide specially crafted HTTP requests that may cause a denial-of-service (DoS) condition.
Specifically, an application is vulnerable if Reactor Netty HTTP Server built-in integration with Micrometer is enabled.
- Record
CVE-2023-34054- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - Updated
- 2026-11-02
OSVGHSA-q24v-hpg3-v3jp
Reactor Netty HTTP Server denial of service vulnerability
In Reactor Netty HTTP Server, versions 1.1.x prior to 1.1.13 and versions 1.0.x prior to 1.0.39, it is possible for a user to provide specially crafted HTTP requests that may cause a denial-of-service (DoS) condition.
Specifically, an application is vulnerable if Reactor Netty HTTP Server built-in integration with Micrometer is enabled.
- Record
GHSA-q24v-hpg3-v3jp- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Show 4 moreShow less
OSVROOT-APP-MAVEN-CVE-2023-34054
CVE-2023-34054 in io.root.io.projectreactor.netty:reactor-netty-core - Patched by Root
Root has patched CVE-2023-34054 in the io.root.io.projectreactor.netty:reactor-netty-core package for Root:Maven. Multiple fixed versions available.
- Record
ROOT-APP-MAVEN-CVE-2023-34054- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVCLSA-2026-1767744512 No score
TuxCare security update for io.projectreactor.netty (2 CVEs)
TuxCare rebuilt 2 io.projectreactor.netty packages to address 2 CVEs. Fixed in 1.0.32-tuxcare.1.
- Record
CLSA-2026-1767744512- Updated
- 2026-11-02
OSVCLSA-2026-1768435721 No score
TuxCare security update for io.projectreactor.netty (4 CVEs)
TuxCare rebuilt 2 io.projectreactor.netty packages to address 4 CVEs. Fixed in 1.0.23-tuxcare.1.
- Record
CLSA-2026-1768435721- 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-coreMaven |
1.1.0 up to 1.1.13 | 1.1.13 |
io.projectreactor.netty:reactor-netty-coreMaven |
1.0.0 up to 1.0.39 | 1.0.39 |
io.projectreactor.netty:reactor-netty-coreTuxCare:Maven From an advisory covering 2 CVEs |
1.0.32 up to 1.0.32-tuxcare.1 | 1.0.32-tuxcare.1 |
io.projectreactor.netty:reactor-netty-httpTuxCare:Maven From an advisory covering 2 CVEs |
1.0.32 up to 1.0.32-tuxcare.1 | 1.0.32-tuxcare.1 |
io.projectreactor.netty:reactor-netty-coreTuxCare:Maven From an advisory covering 4 CVEs |
1.0.23 up to 1.0.23-tuxcare.1 | 1.0.23-tuxcare.1 |
io.projectreactor.netty:reactor-netty-httpTuxCare:Maven From an advisory covering 4 CVEs |
1.0.23 up to 1.0.23-tuxcare.1 | 1.0.23-tuxcare.1 |
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 |
Show 4 moreShow less
| Package | Affected | Fixed |
|---|---|---|
io.projectreactor.netty:reactor-netty-coreMaven |
1.1.0 up to 1.1.13, plus listed versions 1.1.11.1.101.1.111.1.121.1.2 Show 7 moreShow less1.1.31.1.41.1.51.1.61.1.71.1.81.1.9 |
1.1.13 |
io.projectreactor.netty:reactor-netty-coreMaven |
1.0.0 up to 1.0.39, plus listed versions 1.0.11.0.101.0.111.0.121.0.13 Show 33 moreShow less1.0.141.0.151.0.161.0.171.0.181.0.191.0.21.0.201.0.211.0.221.0.231.0.241.0.251.0.261.0.271.0.281.0.291.0.31.0.301.0.311.0.321.0.331.0.341.0.351.0.361.0.371.0.381.0.41.0.51.0.61.0.71.0.81.0.9 |
1.0.39 |
io.root.io.projectreactor.netty:reactor-netty-coreRoot:Maven |
before 1.1.10-root.io.1 | 1.1.10-root.io.11.1.10-root.io.31.1.10-root.io.41.1.10-root.io.5 |
io.projectreactor.netty:reactor-netty-coreRoot:Maven |
before 1.1.10-aikido.5 | 1.1.10-aikido.5 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases, products, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-34054 is a medium vulnerability (CVSS 5.3) in Broadcom Reactor Netty, published November 28, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.91%, the 60th percentile. Fixed in io.projectreactor.netty:reactor-netty-core 1.1.13.
References
spring.io/security/cve-2023-34054
nvd.nist.gov/vuln/detail/CVE-2023-34054
github.com/reactor/reactor-netty/releases/tag/v1.0.39