CVE-2026-47888 Spring Framework Memory Leak via SETUP Frame in RSocketMessageHandler
Attackers can cause a memory leak in Spring RSocket applications by sending malformed SETUP frames, leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-47888?
CVE-2026-47888 is a high-severity denial of service vulnerability in Vmware Spring Framework, published on 27 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A Spring RSocket application is exposed to a memory leak via a malformed SETUP frame. Spring Framework 7.0.0 - 7.0.8 Spring Framework 6.2.0 - 6.2.19 Spring Framework 6.1.0 - 6.1.28 Spring Framework 6.0.0 - 6.0.30 Spring Framework 5.3.0 - 5.3.49 Spring Framework 5.2.0.RELEASE - 5.2.25.RELEASE
Weakness: CWE-401
Which versions are affected by CVE-2026-47888?
It affects 1 product.
Products include Vmware Spring Framework.
How do I fix CVE-2026-47888?
Upgrade to a fixed version.
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-2026-47888 being exploited?
There is no known exploitation of CVE-2026-47888 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-AY31255, CLEANSTART-2026-DD02110, CLEANSTART-2026-FZ12567, CLEANSTART-2026-IA74897, CLEANSTART-2026-NA66363, CLSA-2026-1788283744 and 3 more.