Spring Framework 5.2-7 RSocket memory leak via malformed SETUP frame
CVE-2026-47888 Published on August 27, 2026
Spring Framework Memory Leak via SETUP Frame in RSocketMessageHandler
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
Vulnerability Analysis
CVE-2026-47888 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is a Memory Leak Vulnerability?
The software does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. This is often triggered by improper handling of malformed data or unexpectedly interrupted sessions. In some languages, developers are responsible for tracking memory allocation and releasing the memory. If there are no more pointers or references to the memory, then it can no longer be tracked and identified for release.
CVE-2026-47888 has been classified to as a Memory Leak vulnerability or weakness.
Products Associated with CVE-2026-47888
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Affected Versions
Spring Framework:- Version 7.0.0, <= 7.0.8 is affected.
- Version 6.2.0, <= 6.2.19 is affected.
- Version 6.1.0, <= 6.1.28 is affected.
- Version 6.0.0, <= 6.0.30 is affected.
- Version 5.3.0, <= 5.3.49 is affected.
- Version 5.2.0.RELEASE, <= 5.2.25.RELEASE is affected.