What is CVE-2026-62927?

CVE-2026-62927 is a high-severity vulnerability in Eclipse Milo, classified under Incorrect Authorization. CVSS score: 7.5/10. Published 2026-08-04.

How severe is CVE-2026-62927?

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

Auth bypass in Eclipse Milo

CVE-2026-62927

In Eclipse Milo versions 1.0.0 through 1.1.4, the Call service dispatches the original mixed batch to address-space handlers after calculating authorization, allowing an anonymous or otherwise low-privileged client to execute a denied method by batching it with an allowed method.

Vulnerability class: Broken Access Control

Published 2026-08-04 · last modified 2026-10-23.

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:H/A:N.

EPSS exploit prediction

EPSS: 0.004 (36.1th percentile), scored 2026-11-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Eclipse Milo
Eclipse Foundation Milo — versions 1.0.0

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

github.com/eclipse-milo/milo/commit/59b50bed094de0d18a130a48f3527254dc76105d (Patch)
gitlab.eclipse.org/security/vulnerability-reports/-/work_items/598 (Issue Tracking, Vendor Advisory)
gitlab.eclipse.org/security/cve-assignment/-/work_items/178 (Patch, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2026-62927?: CVE-2026-62927 is a high-severity vulnerability in Eclipse Milo, classified under Incorrect Authorization. CVSS score: 7.5/10. Published 2026-08-04.
How severe is CVE-2026-62927?: High severity. CVSS v3 base score is 7.5 out of 10.