← Vulnerability feed

Vulnerability record · CVE-2026-63252 · published 4 August 2026

CVE-2026-63252: Eclipse milo memory leak vulnerability

Eclipse · Milo

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.

8.7 CVSS 4.0 High EPSS 0.58% · top 54.3% CWE-401 · Memory leak
8.7CVSS 4.0 base score
0.58%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References
5 Aug 2026Last modified by NVD

Description

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/eclipse-milo/milo/commit/459715793ec54b0f33367a14f94264500a0d872b Patch
https://gitlab.eclipse.org/security/cve-assignment/-/work_items/179 Issue TrackingPatchVendor Advisory
https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/598 Issue TrackingVendor Advisory

Track CVE-2026-63252 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.1CVE-2026-60007Eclipse milo vulnerabilityIn Eclipse Milo versions 0.6.0 through 1.1.4, username-token processing returns distinguishable errors for invalid RSA PKCS#1 v1.5 padding and other …EPSS 0.55%8.8CVE-2026-58080Eclipse milo missing authorization vulnerabilityIn Eclipse Milo versions 1.0.0 through 1.1.4, `OpcUaServerConfig.copy()` fails to preserve a configured `RoleMapper`. On servers that rely on role pe…EPSS 0.38%8.7CVE-2026-62927Eclipse milo incorrect authorization vulnerabilityIn Eclipse Milo versions 1.0.0 through 1.1.4, the Call service dispatches the original mixed batch to address-space handlers after calculating author…EPSS 0.42%7.5CVE-2022-25897Eclipse milo allocation without limits vulnerabilityThe package org.eclipse.milo:sdk-server before 0.6.8 are vulnerable to Denial of Service (DoS) when bypassing the limitations for excessive memory co…EPSS 1.3%6.9CVE-2026-61387Eclipse milo uncontrolled resource consumption vulnerabilityIn Eclipse Milo versions 1.0.0 through 1.1.4, monitored-item quota accounting is not exception-safe: if item creation fails with an unchecked error, …EPSS 0.62%6.9CVE-2026-63248Eclipse milo missing authorization vulnerabilityIn Eclipse Milo versions 0.6.0 through 1.1.4, OPC UA server diagnostics nodes do not enforce access authorization. An anonymous client can enable dia…EPSS 0.26%3.3CVE-2023-26083Arm Mali GPU Kernel Driver memory leak exposes kernel metadataThe Arm Mali GPU kernel driver has a memory leak (CWE-401) across Midgard r6p0-r32p0, Bifrost r0p0-r42p0, Valhall r19p0-r42p0, and Avalon r41p0-r42p0…KEVEPSS 1.2%analysed8.6CVE-2018-0158Cisco IOS and IOS XE IKEv2 packet handling memory leak DoSCisco IOS and IOS XE mishandle certain IKEv2 packets, causing improper input validation that leaks memory. Repeated crafted packets drive continuous …KEVEPSS 7.2%analysed

Source: NIST National Vulnerability Database (record CVE-2026-63252), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.