CVE-2023-20863 Spring Framework vulnerable to denial of service
Attackers can cause denial of service in applications using Spring Framework by submitting specially crafted SpEL expressions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-20863?
CVE-2023-20863 is a medium-severity denial of service vulnerability in Vmware Spring Framework, published on 13 Apr 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
In spring framework versions prior to 5.2.24 release+ ,5.3.27+ and 6.0.8+ , it is possible for a user to provide a specially crafted SpEL expression that may cause a denial-of-service (DoS) condition.
Which versions are affected by CVE-2023-20863?
6 open source packages ship an affected version, including org.springframework:spring-expression. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.springframework:spring-expression Maven | All versions | 5.2.24.RELEASE |
org.springframework:spring-expression Maven | All versions | 5.2.24.RELEASE |
org.springframework:spring-expression Maven | From 5.3.0 | 5.3.27 |
org.springframework:spring-expression Maven | From 5.3.0 | 5.3.27 |
org.springframework:spring-expression Maven | From 6.0.0 | 6.0.8 |
org.springframework:spring-expression Maven | From 6.0.0 | 6.0.8 |
Products include Vmware Spring Framework.
How do I fix CVE-2023-20863?
Upgrade org.springframework:spring-expression to a fixed version for your release line: 5.2.24.RELEASE, 5.3.27 or 6.0.8.
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-2023-20863 being exploited?
There is no known exploitation of CVE-2023-20863 in the wild and no public exploit code.
Other vulnerabilities in Vmware Spring Framework
- CVE-2026-47884 Spring Framework Improper Path Limitation in XsltView
- CVE-2026-47890 Spring Framework Server Sent Event stream corruption while rendering fragments
- CVE-2026-47891 Spring Framework maxInMemorySize Bypassed in Jaxb2Decoder
- CVE-2026-47892 Spring Framework Header Predicate Bypass in WebFlux Functional Endpoints
- CVE-2026-59313 Server Sent Event stream corruption in Spring MVC functional web framework
Sources
Also known as CLEANSTART-2026-RX06024, CLSA-2026-1781744127, DEBIAN-CVE-2023-20863, GHSA-wxqc-pxw9-g2p8, ROOT-APP-MAVEN-CVE-2023-20863, UBUNTU-CVE-2023-20863.