CVE-2026-49391 frappe CVE debrief

Who should care

Users of the Frappe framework who have import privileges should review and apply the provided patches. Additionally, users who rely on the Frappe framework for their web applications should ensure that their applications are updated to the latest version to prevent potential exploitation. This includes operators, platform administrators, vulnerability management teams, and security teams who need to assess the impact and take appropriate actions to secure their environments. They should also monitor for suspicious import activities and review compensating controls for exposed systems while remediation is scheduled and verified. Furthermore, they should check relevant monitoring, detection, and logs for exposed assets that need extra review and track exceptions, retest remediated assets, and close the item only after evidence is documented. Users with affected product deployments in managed environments should confirm their exposure and assign an owner for follow-up. They should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance, and plan vendor-supported updates or mitigations through normal change control where exposure is confirmed. They should also consider compensating controls for exposed systems while remediation is scheduled and verified, and check relevant monitoring, detection, and logs for exposed assets that need extra review. Finally, they should track exceptions, retest remediated assets, and close the item only after evidence is documented. This involves confirming whether affected product deployments exist in managed environments and assigning an owner for follow-up, reviewing the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance, planning vendor-supported updates or mitigations through normal change control where exposure is confirmed, reviewing compensating controls for exposed systems while remediation is scheduled and verified, checking relevant monitoring, detection, and logs for exposed assets that need extra review, and tracking exceptions, retesting remediated assets, and closing the item only after evidence is documented. This multi

Technical summary

The Frappe full-stack web application framework has a vulnerability in its Data Import feature. Prior to versions 16.19.0 and 15.109.0, imported column headers are not escaped before rendering previews and results. This allows an authenticated importer to inject script content that will execute when another user views the import interface. The vulnerability affects users with import privileges who could exploit it to execute script content. The issue is fixed in versions 16.19.0 and 15.109.0. Users should review and apply patches according to vendor guidance.

Defensive priority

Authenticated users with import privileges could exploit this vulnerability to execute script content when another user views the import interface.

Recommended defensive actions

• Review and apply the provided patches in versions 16.19.0 and 15.109.0.
• Restrict import privileges to trusted users.
• Monitor for suspicious import activities.
• 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.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE record indicates that Frappe is a full-stack web application framework and that Data Import does not escape imported column headers before rendering previews and results. This allows an authenticated importer to persist script content that executes when another user views the import interface. Evidence is limited, and defenders should verify the affected scope and apply patches according to vendor guidance.

Official resources