Is CVE-2026-84795 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-84795 being exploited in the wild.

How severe is CVE-2026-84795?

Critical severity, with a CVSS score of 9.8, published 2 September 2026.

Which products and versions are affected?

Craft CMS 5.0.0-RC1 through 5.10.10.

Is there a fix for CVE-2026-84795?

A patch was published on 2026-09-02: Fix available in version 5.10.11 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-84795 attacked?

It is attacked over the network.

Am I affected by CVE-2026-84795?

Check whether anything you run is named in the advisory. 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-2026-84795: Craft CMS privilege escalation via admin flag inheritance in user registration

CVE-2026-84795 · Severity: critical · CVSS 9.8 · Published 2026-09-02

Craft CMS is a web content management system that allows administrators to manage website content and user accounts. A vulnerability in versions before 5.10.11 allows an attacker to register a new account using the email address of a deactivated administrator and automatically inherit full administrator privileges. This requires the CMS to be configured to allow public registration without email verification—settings some deployments use—and could lead to complete unauthorized control over the website, all user accounts, and sensitive business data.

Quick answers

Is CVE-2026-84795 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-84795 being exploited in the wild.
How severe is CVE-2026-84795?: Critical severity, with a CVSS score of 9.8, published 2 September 2026.
Which products and versions are affected?: Craft CMS 5.0.0-RC1 through 5.10.10.
Is there a fix for CVE-2026-84795?: A patch was published on 2026-09-02: Fix available in version 5.10.11 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-84795 attacked?: It is attacked over the network.
Am I affected by CVE-2026-84795?: Check whether anything you run is named in the advisory. 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 privilege management flaw (CWE-269) in Craft CMS's user registration flow. The root cause is missing change-detection guards in the User::afterSave() method, which unconditionally writes the admin flag without authorization checks—unlike other security-sensitive user flags (active, pending, locked, suspended) that have protective guards. When public registration is enabled (allowPublicRegistration=true) and email verification is disabled (requireEmailVerification=false), an attacker can register using a deactivated admin's email address. The system reuses the inactive user record from the database, which still has admin=true set, and the missing guard allows the flag to persist into the newly activated account. No authentication is required beyond the ability to submit a registration form. Patches are available in version 5.10.11 and later.

Affected products

Craft CMS 5.0.0-RC1 through 5.10.10

Timeline

2026-08-18: disclosed: GitHub Security Advisory GHSA-242m-9wq7-vhwq published
2026-09-02: advisory: CVE-2026-84795 published
2026-09-02: patched: Fix available in version 5.10.11

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.