CVE-2026-63252: milo — Fix

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.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploit Prediction

0.0042

Probability of exploitation

0.35%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-401 CWE-401

Affected Products

Vendor	Product	Versions
eclipse	milo	0.6.0 — 1.1.5

References

Advisories & Patches

https://github.com/eclipse-milo/milo/commit/459715793ec54b0f33367a14f94264500a0d872b https://gitlab.eclipse.org/security/cve-assignment/-/work_items/179 https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/598

Frequently Asked Questions

What is CVE-2026-63252? +

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. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-63252? +

CVE-2026-63252 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0042, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-63252? +

CVE-2026-63252 affects products from eclipse, specifically: milo. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-63252? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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