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CVE-2026-124429: Craft CMS Security Vulnerability

CVE-2026-124429 explained: high Security Vulnerability in Craft CMS. CVSS 8.7. Affected versions, detection, fixes and CTEM priority.

Last updated: Nov 8, 2026

CVSS
8.7 HIGH
EPSS
n/a
CISA KEV
Not listed
CWE
CWE-266

Sources: National Vulnerability Database, CVE.org, CISA KEV, FIRST EPSS

CVE-2026-124429 Overview

Craft CMS from 5.0.0 before 5.11.2 contains a privilege escalation vulnerability that allows unauthenticated public registrants to reclaim deactivated non-admin accounts while retaining their direct permissions. Attackers can register using a deactivated account, set a new password, and inherit permissions stored in userpermissions_users, enabling privileged account takeover when email verification is disabled.

Critical Impact

Remote, unauthenticated attackers can exploit this Security Vulnerability in Craft CMS. The CVSS base score is 8.7 (High).

Affected Products

  • Craft CMS: see the vendor advisory for the exact affected versions

Discovery Timeline

  • 2026-11-08: CVE-2026-124429 published to the National Vulnerability Database by disclosure@vulncheck.com
  • 2026-11-08: last updated in the NVD database

Technical Details for CVE-2026-124429

Vulnerability Analysis

CVE-2026-124429 is a Security Vulnerability weakness (CWE-266) in Craft CMS. Based on its CVSS vector, the flaw can be reached over the network, needs no login, and needs no user interaction.

With a CVSS base score of 8.7, apply the vendor fix and confirm exposure on internet facing and business critical assets first.

Root Cause

The vendor description states: Craft CMS from 5.0.0 before 5.11.2 contains a privilege escalation vulnerability that allows unauthenticated public registrants to reclaim deactivated non-admin accounts while retaining their direct permissions. Attackers can register using a deactivated account, set a new password, and inherit permissions stored in userpermissions_users, enabling privileged account takeover when email verification is disabled.

Attack Vector

Based on the CVSS vector, the flaw can be reached over the network, needs no login, and needs no user interaction. Attack complexity is low complexity.

No exploitation in the wild is confirmed by CISA at the time of the last update. Check the references below for any vendor or researcher proof of concept.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Detection Methods for CVE-2026-124429

Detection Strategies

  • Inventory every instance of Craft CMS and compare the running version with the affected range above.
  • Check external attack surface scans for internet facing instances of the component.
  • Run an authenticated vulnerability scan once your scanner ships a check for this CVE.

Monitoring Recommendations

  • Forward Craft CMS application, access and audit logs to your SIEM for retrospective hunting.
  • Alert on new processes, configuration changes or outbound connections from the affected service.
  • Track the vendor advisory and the CISA KEV catalog for changes in exploitation status.

How to Mitigate CVE-2026-124429

Immediate Actions Required

  • Apply the fixed version of Craft CMS named in the vendor advisory.
  • Prioritize internet facing and business critical instances first.
  • Rescan after the change to confirm the exposure is closed.

Patch Information

Use the fixed version listed in the vendor advisory for Craft CMS.

Workarounds

  • If patching must wait, restrict network access to the affected service and place it behind authentication or a web application firewall rule.

CWE References

Technical References

This entry is built directly from NVD, CISA KEV and EPSS data. Verify fixed versions in the vendor advisory before you deploy.

Frequently asked questions

CVE-2026-124429 is a high severity Security Vulnerability in Craft CMS with a CVSS score of 8.7. Apply the vendor fix and confirm exposure on internet facing and business critical assets first.

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