How severe is CVE-2026-63252?

CVE-2026-63252 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-63252 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-63252?

CVE-2026-63252 affects Eclipse Milo. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-63252?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-63252 published?

CVE-2026-63252 was published on 2026-08-04 and last updated on 2026-08-05.

CVE-2026-63252

CVE-2026-63252 is a high-severity vulnerability in Eclipse Milo with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-401.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 8.7
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-401
Affected product: Eclipse Milo
Published: 2026-08-04
Last modified: 2026-08-05

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.

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.
How severe is CVE-2026-63252?: CVE-2026-63252 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-63252 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-63252?: CVE-2026-63252 affects Eclipse Milo. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-63252?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-63252 published?: CVE-2026-63252 was published on 2026-08-04 and last updated on 2026-08-05.

References

Affected products (1)

cpe:2.3:a:eclipse:milo:*:*:*:*:*:*:*:*

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