What is CVE-2026-123655?

CVE-2026-123655 is a high-severity vulnerability, classified under Missing Authorization. CVSS score: 7.5/10. Published 2026-11-06.

How severe is CVE-2026-123655?

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

CVE-2026-123655

CVE-2026-123655

A flaw was found in Moodle. Insufficient access control checks on H5P content files allow unauthenticated remote attackers to view restricted materials, including content stored in the system context and files belonging to hidden or unavailable course modules. This issue results in unauthorized information disclosure of protected content.

Vulnerability class: Broken Access Control

Published 2026-11-06 · last modified 2026-11-06.

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:H/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

access.redhat.com/security/cve/CVE-2026-123655 (vdb-entry)
RHBZ#2568053 (issue-tracking)
github.com/moodle/moodle/commit/4b42ce4ed1d132214fd4b7d4b5f4f0387ec28a49
moodle.org/mod/forum/discuss.php

Frequently asked questions

What is CVE-2026-123655?: CVE-2026-123655 is a high-severity vulnerability, classified under Missing Authorization. CVSS score: 7.5/10. Published 2026-11-06.
How severe is CVE-2026-123655?: High severity. CVSS v3 base score is 7.5 out of 10.