What is CVE-2026-63252?

CVE-2026-63252 is a high-severity vulnerability in Eclipse Milo, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 7.5/10. Published 2026-08-04.

How severe is CVE-2026-63252?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Eclipse Milo

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.

EPSS: 0.004 (36.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Eclipse Milo
Eclipse Foundation Milo — versions 0.6.0

Weakness classification (CWE)

CWE-401 — Missing Release of Memory after Effective Lifetime

References

emo@eclipse.org (Patch)
emo@eclipse.org (Issue Tracking, Vendor Advisory)
emo@eclipse.org (Patch, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2026-63252?: CVE-2026-63252 is a high-severity vulnerability in Eclipse Milo, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 7.5/10. Published 2026-08-04.
How severe is CVE-2026-63252?: High severity. CVSS v3 base score is 7.5 out of 10.