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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | io.projectreactor.netty:reactor-netty-core | >= 1.1.0, < 1.1.13, >= 1.0.0, < 1.0.39 | 1.1.13, 1.0.39 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2023-34054
- https://github.com/reactor/reactor-netty/commit/37dc8a2ef6514cd7834e75e7f3faf0b9ea044c88
- https://github.com/reactor/reactor-netty/commit/4ddbb1b9b985bb72290110ebae468a54e7f19420
- https://github.com/reactor/reactor-netty/commit/ae82154e99e6f51f4816effd135f0c3a966d6ea3
- https://github.com/reactor/reactor-netty
- https://github.com/reactor/reactor-netty/releases/tag/v1.0.39
- https://github.com/reactor/reactor-netty/releases/tag/v1.1.13
- https://spring.io/security/cve-2023-34054
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Weakness (CWE)
-- Platform
- Java / Kotlin (Maven)
- Package
io.projectreactor.netty:reactor-netty-core- Disclosed
- 28.11.2023
- Updated
- 11.10.2026 12:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-q24v-hpg3-v3jp - CC BY 4.0
Vulnerability history: io.projectreactor.netty:reactor-netty-core
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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