CVE-2026-77116 Brave CVE debrief

Who should care

WordPress administrators and users with access to popup content in Brave Popup Builder should assess their exposure and take defensive actions to prevent potential data breaches. This includes reviewing access controls, updating to the latest version, and implementing compensating controls for exposed systems. Security teams should prioritize verification of affected versions and remediation status to mitigate potential risks.

Why it matters

CVE-2026-77116 is a medium-severity vulnerability in Brave Popup Builder that allows logged-in users to access unauthorized popup content. WordPress administrators and users with access to popup content should assess their exposure and take defensive actions to prevent potential data exposure and unauthorized access.

• Potential unauthorized access to sensitive popup content.
• Possible data exposure for logged-in users with limited privileges.
• Requires verification of affected versions and remediation status.

Technical summary

The Brave Popup Builder plugin, versions through 0.8.5, has a broken access control issue allowing logged-in users, including Subscribers and WooCommerce Customers, to read popup content they shouldn't have access to by passing a post ID in the URL. This issue exists due to insufficient authorization checks, potentially leading to unauthorized access and data exposure. The vulnerability has a medium-severity CVSS score of 4.3, indicating a moderate risk to affected deployments. Defenders should review access controls, implement proper authorization checks, and update to the latest version if available.

Defensive priority

Medium-priority defensive actions are recommended to address this vulnerability.

Recommended defensive actions

• Review and restrict access controls for popup content in Brave Popup Builder versions through 0.8.5.
• Implement proper authorization checks to prevent unauthorized access to popup content.
• Update Brave Popup Builder to the latest version if available.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

Evidence from the CVE Program and NVD indicates a broken access control issue in Brave Popup Builder versions through 0.8.5. The CVE record and NVD detail page provide official confirmation of this vulnerability. However, the exact scope of affected deployments and specific exploitation details are not publicly available. Defenders should verify the presence of affected versions in their environments and review official advisories for remediation guidance.

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.