Is CVE-2026-90916 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-90916 being exploited in the wild.

How severe is CVE-2026-90916?

Informational severity, published 29 September 2026.

Which products and versions are affected?

Joomla! Joomla CMS 4.0.0-5.4.8, 6.0.0-6.1.3.

Is there a fix for CVE-2026-90916?

A patch was published on 2026-09-25: Upgrade to version 5.4.9 or 6.1.4 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-90916 attacked?

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

Am I affected by CVE-2026-90916?

Check whether you run Joomla! Joomla CMS at an affected version. 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-2026-90916: Joomla CMS improper ACL checks in content history comparison

CVE-2026-90916 · Severity: info · Published 2026-09-29

Joomla CMS, a widely-used content management system for building websites and online applications, contains an access control flaw in its content history comparison feature. The vulnerability allows unauthorized users to view article contents and page data they should not have permission to access, potentially exposing sensitive or restricted information published on affected websites.

Technologies: Joomla! Joomla CMS. Vendors: Joomla!.

Quick answers

Is CVE-2026-90916 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-90916 being exploited in the wild.
How severe is CVE-2026-90916?: Informational severity, published 29 September 2026.
Which products and versions are affected?: Joomla! Joomla CMS 4.0.0-5.4.8, 6.0.0-6.1.3.
Is there a fix for CVE-2026-90916?: A patch was published on 2026-09-25: Upgrade to version 5.4.9 or 6.1.4 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-90916 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-90916?: Check whether you run Joomla! Joomla CMS at an affected version. 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

The vulnerability is an improper access control (ACL) check in the content history comparison view that fails to properly validate user permissions before displaying article history. An unauthenticated or unprivileged user can access the comparison view via a direct request, bypassing authorization checks. The fix addresses missing or incorrect permission validation in the affected component.

Affected products

Joomla Joomla CMS 4.0.0-5.4.8, 6.0.0-6.1.3

Timeline

2026-09-29: disclosed
2026-09-25: patched: Upgrade to version 5.4.9 or 6.1.4

References

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