Is CVE-2026-123655 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-123655 being exploited in the wild.

How severe is CVE-2026-123655?

High severity, with a CVSS score of 7.5, published 6 November 2026.

Is there a fix for CVE-2026-123655?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-123655 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-123655?

Check whether you run Moodle. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-123655: Moodle insufficient access control in H5P content files

CVE-2026-123655 · Severity: high · CVSS 7.5 · Published 2026-11-06

Moodle is an open-source learning management system that hosts educational content and courses. A flaw in access controls allows unauthenticated attackers to view restricted course materials, including content from hidden courses and unavailable modules, resulting in unauthorized disclosure of protected educational content.

Technologies: Moodle. Vendors: Moodle.

Quick answers

Is CVE-2026-123655 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-123655 being exploited in the wild.
How severe is CVE-2026-123655?: High severity, with a CVSS score of 7.5, published 6 November 2026.
Which products and versions are affected?: Moodle Moodle.
Is there a fix for CVE-2026-123655?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-123655 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-123655?: Check whether you run Moodle. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

Insufficient access control checks in H5P content file handling permit unauthenticated remote attackers to bypass authorization, accessing restricted materials stored in system context and files associated with hidden or unavailable course modules. This is a missing authorization vulnerability (CWE-862) requiring no authentication or user interaction, accessible over the network.

Affected products

Moodle Moodle

Timeline

2026-11-06: disclosed

References

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