Eclipse Milo 0.6.0-1.1.4 UASC Server Transport Handlers Leak Memory
CVE-2026-63252 Published on August 4, 2026
In Eclipse Milo versions 0.6.0 through 1.1.4, UASC server transport handlers fail to release retained partial message chunks when a channel disconnects, allowing a remote unauthenticated client to exhaust pooled direct memory by repeatedly sending incomplete chunks and disconnecting, potentially terminating the server.
Vulnerability Analysis
CVE-2026-63252 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 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-2026-63252 has been classified to as a Memory Leak vulnerability or weakness.
Affected Versions
Eclipse Foundation Eclipse Milo:- Version 0.6.0, <= 1.1.4 is affected.