Quick answer
Direct answer
Risk scores
| CVSS metric | What it means |
|---|---|
| Attack vector (AV:N) | Network: reachable remotely |
| Attack complexity (AC:L) | Low complexity |
| Attack requirements (AT:N) | No attack requirements |
| Privileges required (PR:N) | No privileges required |
| User interaction (UI:N) | No user interaction |
| Confidentiality (VC:H) | High confidentiality impact |
| Integrity (VI:H) | High integrity impact |
| Availability (VA:N) | No availability impact |
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/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
About Frappe Erpnext
CVE-2026-27471 affects Frappe Erpnext, a product from Frappe. Before acting, confirm where Frappe Erpnext runs in your estate, who owns it and whether it is reachable from the internet, because exposure decides real risk more than the score alone.
What the flaw is
In plain terms: ERP is a free and open source Enterprise Resource Planning tool. In versions up to 15.98.0 and 16.0.0-rc.1 and through 16.6.0, certain endpoints lacked access validation which allowed for unauthorized document access. This issue has been fixed in versions 15.98.1 and 16.6.1.
The weakness class is Improper Access Control. The software does not properly restrict who can use a resource.
Based on its CVSS vector, the flaw can be reached over the network, needs no login, and needs no user interaction. Apply the vendor fix and confirm exposure on internet facing and business critical assets first.
Affected versions and timeline
| Field | Detail |
|---|---|
| Product | Frappe Erpnext |
| Affected versions | Erpnext before 15.98.1; Erpnext after 16.0.0 before 16.6.1; Erpnext 16.0.0 |
| Published | Feb 21, 2026 |
| Last modified | Jun 17, 2026 |
| Added to CISA KEV | Not listed |
| Assigning CNA | security-advisories@github.com |
How to detect it
- Inventory every instance of Frappe Erpnext and record the running version against the affected range above.
- Check external attack surface scans for internet facing instances of the component.
- Review logs on affected systems for unusual requests, errors or new processes around the vulnerable function.
- Confirm with an authenticated vulnerability scan once your scanner has a check for this CVE.
How to fix it
- Apply the fixed version of Frappe Erpnext named in the vendor advisory.
- If patching must wait, restrict network access to the affected service and put it behind authentication or a web application firewall rule.
- Rescan after the change to prove the exposure is gone, then close the ticket.
CTEM action plan
| CTEM stage | What to do for this CVE |
|---|---|
| Scope | Add every business service that depends on Frappe Erpnext to the current CTEM cycle. |
| Discover | Find all instances, including shadow and cloud deployments, and record versions and exposure. |
| Prioritize | Rank using EPSS and CVSS together with asset exposure and business impact. |
| Validate | Confirm the flaw is reachable and exploitable in your environment and that compensating controls work. |
| Mobilize | Assign the fix to the asset owner with a due date matched to the priority, then verify closure. |
CWE References
- CWE-284: Improper Access Control More CVEs with this weakness
- CWE-306: Missing Authentication More CVEs with this weakness
- CWE-862: Missing Authorization More CVEs with this weakness
Technical References
Frequently asked questions
Related CVEs
ERPNext is a free and open source Enterprise Resource Planning tool. Prior to 16.9.0, some endpoints were vulnerable to SQL injection through specially crafted requests, which would allow a malicious actor to extract sensitive information. This vulnerability is fixed in 16.9.0.
ERPNext is a free and open source Enterprise Resource Planning tool. Prior to 15.104.3 and 16.14.0, some endpoints were vulnerable to SQL injection through specially crafted requests, which would allow a malicious actor to extract sensitive information. This vulnerability is fixed in 15.104.3 and 16.14.0.
A Server-Side Request Forgery (SSRF) vulnerability exists in the Print Format functionality of ERPNext v16.0.1 and Frappe Framework v16.1.1, where user-supplied HTML is insufficiently sanitized before being rendered into PDF. When generating PDFs from user-controlled HTML content, the application allows the inclusion of HTML elements such as <iframe> that reference external resources. The PDF rendering engine automatically fetches these resources on the server side. An attacker can abuse this behavior to force the server to make arbitrary HTTP requests to internal services, including cloud metadata endpoints, potentially leading to sensitive information disclosure.
ERP is a free and open source Enterprise Resource Planning tool. In versions prior to 16.8.0 and 15.100.0, certain endpoints were vulnerable to time-based and boolean-based blind SQL injection due to insufficient parameter validation, allowing attackers to infer database information. This issue has been fixed in versions 15.100.0 and 16.8.0.
Frappe is a full-stack web application framework. Prior to 15.84.0 and 14.99.0, a specially crafted request made to a certain endpoint could result in SQL injection, allowing an attacker to extract information they wouldn't otherwise be able to. This vulnerability is fixed in 15.84.0 and 14.99.0.
File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. In versions 2.61.2 and below, any unauthenticated visitor can register a full administrator account when self-registration (signup = true) is enabled and the default user permissions have perm.admin = true. The signup handler blindly applies all default settings (including Perm.Admin) to the new user without any server-side guard that strips admin from self-registered accounts. The signupHandler is supposed to create unprivileged accounts for new visitors. It contains no explicit user.Perm.Admin = false reset after applying defaults. If an administrator (intentionally or accidentally) configures defaults.perm.admin = true and also enables signup, every account created via the public registration endpoint is an administrator with full control over all files, users, and server settings. This issue has been resolved in version 2.62.0.
Earn your free CTEM certification.
Learn to scope, prioritize, validate and mobilize fixes for CVEs like CVE-2026-27471 with a free CTEM certification.
Beginner / Practitioner / Program Leader
Explore certifications