CVE-2023-34055 Spring Boot server Web Observations DoS Vulnerability
Attackers can cause denial of service in Spring Boot applications using MVC or WebFlux with Actuator via crafted HTTP requests.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-34055?
CVE-2023-34055 is a medium-severity denial of service vulnerability in Spring Boot, published on 28 Nov 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In Spring Boot versions 2.7.0 - 2.7.17, 3.0.0-3.0.12 and 3.1.0-3.1.5, 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 when all of the following are true:
* the application uses Spring MVC or Spring WebFlux * org.springframework.boot:spring-boot-actuator is on the classpath
Which versions are affected by CVE-2023-34055?
6 open source packages ship an affected version, including org.springframework.boot:spring-boot-actuator. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.springframework.boot:spring-boot-actuator Maven | All versions | 2.7.18 |
org.springframework.boot:spring-boot-actuator Maven | All versions | 2.7.18 |
org.springframework.boot:spring-boot-actuator Maven | From 3.0.0 | 3.0.13 |
org.springframework.boot:spring-boot-actuator Maven | From 3.0.0 | 3.0.13 |
org.springframework.boot:spring-boot-actuator Maven | From 3.1.0 | 3.1.6 |
org.springframework.boot:spring-boot-actuator Maven | From 3.1.0 | 3.1.6 |
Products include Vmware Spring Boot.
How do I fix CVE-2023-34055?
Upgrade org.springframework.boot:spring-boot-actuator to a fixed version for your release line: 2.7.18, 3.0.13 or 3.1.6.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-34055 being exploited?
There is no known exploitation of CVE-2023-34055 in the wild and no public exploit code.
Other vulnerabilities in Spring Boot
- CVE-2023-20873 Spring Boot Security Bypass with Wildcard Pattern Matching on Cloud Foundry
- CVE-2026-40976 Spring Boot's default security filter chain has no authorization rule with Actuator but without Health
- CVE-2026-22731 Authentication Bypass under Actuator Health groups paths
- CVE-2026-22733 Authentication Bypass under Actuator CloudFoundry endpoints
- CVE-2022-27772 Temporary Directory Hijacking to Local Privilege Escalation Vulnerability in org.springframework.boot:spring-boot
Sources
Also known as CLSA-2026-1769472532, CLSA-2026-1776040413, GHSA-jjfh-589g-3hjx.