CVE-2026-44206 Overview
CVE-2026-44206 is an information disclosure vulnerability in Frappe, a full-stack web application framework used by ERPNext and many production deployments. An unauthenticated endpoint allows attackers to enumerate database schema details remotely. The flaw falls under [CWE-200] (Exposure of Sensitive Information to an Unauthorized Actor).
Frappe maintainers patched the issue in versions 15.107.2 and 16.17.4. Versions prior to these patches are vulnerable. The flaw is exploitable over the network without authentication or user interaction, but it does not directly affect integrity or availability.
Critical Impact
Unauthenticated remote attackers can enumerate the database schema of vulnerable Frappe instances, exposing table and column structure that supports follow-on attacks against application data.
Affected Products
- Frappe Framework versions prior to 15.107.2 (15.x branch)
- Frappe Framework versions prior to 16.17.4 (16.x branch)
- Downstream applications built on vulnerable Frappe versions, including ERPNext deployments
Discovery Timeline
- 2026-06-12 - CVE-2026-44206 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2026-44206
Vulnerability Analysis
Frappe exposes HTTP endpoints that handle data access and metadata operations across DocTypes. One of these endpoints did not adequately restrict access to schema metadata. An unauthenticated attacker can craft requests that cause the application to disclose database schema information, including table names, column names, and related structural details.
The vulnerability is classified as [CWE-200], Exposure of Sensitive Information to an Unauthorized Actor. The disclosed schema is not user data itself, but it provides attackers with the structural map needed to target subsequent injection, business logic, or access-control attacks against the underlying database. The CVSS vector indicates a network-reachable, low-complexity, no-privilege flaw affecting confidentiality only.
Root Cause
The root cause is missing or insufficient authorization on an endpoint that returns schema metadata. The Frappe security advisory describes the issue as DB Schema Enumeration through an exposed endpoint. The endpoint returned schema-related responses to callers that should have been blocked or required authenticated, privileged context.
Attack Vector
The attack vector is remote and unauthenticated. An attacker sends HTTP requests directly to a vulnerable Frappe site and parses the responses to map the database schema. No phishing, user interaction, or prior foothold is required. Refer to the GitHub Security Advisory GHSA-9c55-cq5r-qj5x for vendor-confirmed technical detail. No public proof-of-concept is currently linked in the advisory.
Detection Methods for CVE-2026-44206
Indicators of Compromise
- Unauthenticated HTTP requests to Frappe metadata or DocType endpoints originating from external IP addresses
- Bursts of requests probing multiple DocType or schema-related URL paths within short time windows
- Anomalous response sizes from Frappe endpoints that normally return small payloads to unauthenticated callers
Detection Strategies
- Inspect Frappe and reverse proxy access logs for unauthenticated requests to internal API or metadata routes
- Correlate scanning patterns against the affected version range to prioritize hosts running Frappe before 15.107.2 or 16.17.4
- Alert on enumeration-style traffic: repeated requests with iterating DocType names or schema parameters from a single source
Monitoring Recommendations
- Track Frappe application version inventory and flag any deployment below the patched releases
- Forward web server, application, and WAF logs to a central analytics platform for retroactive hunting once patched
- Monitor outbound database query volume for sudden increases that may follow schema reconnaissance
How to Mitigate CVE-2026-44206
Immediate Actions Required
- Upgrade Frappe to version 15.107.2 on the 15.x branch or 16.17.4 on the 16.x branch
- Restrict network exposure of Frappe administrative and metadata endpoints to trusted networks where feasible
- Review access logs for prior unauthenticated probing of metadata endpoints and treat affected sites as potentially enumerated
Patch Information
The Frappe project released fixes in versions 15.107.2 and 16.17.4. Both releases address the schema enumeration endpoint. Details are published in the Frappe GitHub Security Advisory GHSA-9c55-cq5r-qj5x. Operators running ERPNext or other Frappe-based stacks should align their bench upgrade plans with the patched versions.
Workarounds
- Place Frappe behind a reverse proxy or WAF that blocks unauthenticated access to schema and metadata endpoints until patching is complete
- Apply IP allow-listing on administrative routes to reduce exposure to internet-based scanners
- If patching cannot be performed immediately, isolate vulnerable instances from untrusted networks and increase log retention to support post-patch investigation
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
