CVE-2026-64871 regularlabs.com CVE debrief

Who should care

Defenders responsible for Joomla installations and cache management should assess exposure and verify the version of the Cache Cleaner extension in use.

Why it matters

Defenders should care about CVE-2026-64871 because it affects the Joomla Cache Cleaner extension, potentially allowing unauthorized cache management actions due to inconsistent CSRF token checks and privilege checks.

• Potential unauthorized cache management actions
• Inconsistent CSRF token checks may allow unintended changes

Technical summary

The Joomla Extension - regularlabs.com - Cache Cleaner extension has inconsistent CSRF token checks and privilege checks. Administrator URL purges do not consistently require a valid token and cache-management permission. This could potentially allow unauthorized actions.

Defensive priority

Defenders should prioritize verifying the version of the Cache Cleaner extension in use and ensuring that appropriate permissions and token checks are in place.

Recommended defensive actions

• Verify the version of the Cache Cleaner extension in use
• Ensure appropriate permissions and token checks are in place
• Review administrator URL purges for consistent CSRF token checks

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its CVSS score and weaknesses (CWE-284, CWE-352). The vulnerability affects Joomla installations and cache management, potentially allowing unauthorized cache management actions due to inconsistent CSRF token checks and privilege checks. Defenders should verify the version of the Cache Cleaner extension in use and ensure that appropriate permissions and token checks are in place. The official CVE Program and N

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.