title: Spring Framework server Web Observations DoS Vulnerability
description: In Spring Framework versions 6.0.0 - 6.0.13, 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
*  io.micrometer:micrometer-core is on the classpath
*  an ObservationRegistry is configured in the application to record observations
Typically, Spring Boot applications need the org.springframework.boot:spring-boot-actuator dependency to meet all conditions.
affected:
{
defaultStatus: unaffected
platforms: [Windows, MacOS, Linux, iOS, Android, x86, ARM, 64 bit, 32 bit]
product: Spring Framework
vendor: Spring
versions:
lessThan: 6.0.14, status: affected, version: 6.0.0, versionType: 6.0.14
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: LOW
baseScore: 5.3
baseSeverity: MEDIUM
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
version: 3.1
]
format: CVSS
scenarios: GENERAL