CVE-2026-47864 Unsafe Java deserialization in SerializingHttpMessageConverter — remote code execution
Remote attackers can execute arbitrary code via unsafe Java deserialization in Spring Integration's HTTP message converter.
- 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-2026-47864?
CVE-2026-47864 is a medium-severity unsafe deserialization vulnerability in Spring Integration, published on 27 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
SerializingHttpMessageConverter deserializes the body of incoming HTTP requests with a raw java.io.ObjectInputStream and no class filtering. Any request with Content-Type application/x-java-serialized-object whose body resolves to a Serializable type is read directly via readObject(). If an application using this converter on an inbound HTTP endpoint has any known Java deserialization "gadget" on its classpath, a remote, unauthenticated attacker can achieve arbitrary code execution. Spring Integration 7.1.0 Spring Integration 7.0.0 - 7.0.5 Spring Integration 6.5.0 - 6.5.10 Spring Integration 6.4.0 - 6.4.12 Spring Integration 5.5.21 and earlier
Weakness: CWE-502
Which versions are affected by CVE-2026-47864?
It affects 1 product.
Products include Vmware Spring Integration.
How do I fix CVE-2026-47864?
Upgrade to a fixed version.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-47864 being exploited?
There is no known exploitation of CVE-2026-47864 in the wild and no public exploit code.
Other vulnerabilities in Spring Integration
- CVE-2026-59324 fluxTransform shared RequestMessageHolder causes cross-message header leakage under async fluxFunction
- CVE-2026-59307 Deserialization allow-list silently bypassed: setBeanClassLoader replaces deserializer but mapper keeps stale reference
- CVE-2026-40987 Spring Integration File Support: FTP/SFTP/SMB server can write arbitrary files anywhere on the client filesystem
- CVE-2026-59311 Fixed predictable /tmp/ziptransformer work directory enables symlink pre-creation
- CVE-2026-59293 SMB minimum protocol dialect defaults to SMB1
Sources
Also known as GHSA-hwxv-6jph-89hg.