CVE-2023-34054: medium-severity vulnerability in Spring Reactor Netty
Reactor Netty HTTP Server Metrics DoS Vulnerability
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.3epss 0.9%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected products
Spring · Reactor NettyRelated CVEs — Spring Reactor Netty
In the same product, most dangerous first.
CVE-2026-47874MEDIUMReactor Netty HTTP Server Denial of Service With Pipelined RequestsEPSS 0.4%CVE-2026-47845MEDIUMReactor Netty HTTP Server may incorrectly evaluate proxy addressesEPSS 0.3%CVE-2026-47848MEDIUMReactor Netty WebSocket Client Leaks Credentials On RedirectEPSS 0.3%CVE-2026-47843LOWReactor Netty may incorrectly route traffic due to DNS resolver reuseEPSS 0.3%CVE-2026-47844MEDIUMReactor Netty HTTP Server Leaks Exception DetailsEPSS 0.2%CVE-2026-41715MEDIUMReactor Netty HTTP Client Leaks Credentials On Protocol Downgrade RedirectEPSS 0.2%