CVE-2026-64821 in djangoSIGE
Summary
by MITRE • 07/22/2026
djangoSIGE through 1.10 (commit a6fe7e8) contains a cross-site request forgery vulnerability that allows unauthenticated attackers to cancel sales or purchase orders on behalf of authenticated users by exploiting order-cancellation logic implemented inside HTTP GET method handlers in CancelarOrcamentoVendaView, CancelarPedidoVendaView, CancelarOrcamentoCompraView, and CancelarPedidoCompraView. Attackers can lure an authenticated victim with change_orcamentovenda or equivalent permissions to a page containing a cross-origin reference such as an img tag pointing to the cancellation endpoint, bypassing CSRF token validation entirely since Django's CsrfViewMiddleware only enforces CSRF checks on unsafe HTTP methods.
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Analysis
by VulDB Data Team • 07/22/2026
This vulnerability exists within the djangoSIGE application version 1.10 and earlier, where specific view classes implement order cancellation functionality using HTTP GET method handlers instead of POST requests. The flaw stems from improper handling of state-changing operations through GET endpoints, which violates fundamental web security principles and creates a significant cross-site request forgery risk. The affected views CancelarOrcamentoVendaView, CancelarPedidoVendaView, CancelarOrcamentoCompraView, and CancelarPedidoCompraView process cancellation requests through GET methods, making them susceptible to exploitation by malicious actors who can craft URLs that trigger these operations when loaded by authenticated users.
The technical implementation of this vulnerability demonstrates a critical failure in the application's security architecture where Django's built-in CSRF protection mechanisms are effectively bypassed. This occurs because Django's CsrfViewMiddleware is designed to validate CSRF tokens only for unsafe HTTP methods such as POST, PUT, DELETE, and PATCH, while leaving GET requests unprotected. Attackers can exploit this by embedding malicious links or images within web pages that point to the vulnerable cancellation endpoints, causing authenticated users' browsers to automatically submit these requests when they visit the malicious page. This technique allows unauthenticated attackers to perform unauthorized actions on behalf of legitimate users who possess the required permissions such as change_orcamentovenda.
The operational impact of this vulnerability is substantial as it enables attackers to manipulate critical business operations without authentication, potentially leading to financial losses through unauthorized order cancellations and disrupting normal business workflows. The vulnerability affects authenticated users with specific permissions, meaning that any user with access to these cancellation endpoints could be exploited by an attacker who lures them into visiting a malicious page. This creates a scenario where legitimate business processes are compromised through social engineering attacks that exploit the trust relationship between the user's browser and the application. The attack vector is particularly dangerous because it requires no authentication credentials from the attacker, only the ability to influence a victim to visit a malicious web page.
From a cybersecurity perspective, this vulnerability maps directly to CWE-352 Cross-Site Request Forgery and aligns with ATT&CK technique T1566.001 for initial access through spearphishing attachments. The flaw represents a design-level security issue rather than an implementation bug, indicating that the application architecture needs to be reviewed for proper handling of state-changing operations. Organizations should implement immediate mitigations by changing the HTTP methods used for cancellation operations from GET to POST and ensuring that all state-changing operations are protected with appropriate CSRF validation. Additionally, implementing proper input validation and access controls around these endpoints would provide defense-in-depth measures against similar vulnerabilities.
The remediation approach should involve modifying the affected view classes to reject GET requests for cancellation operations and require explicit POST requests with valid CSRF tokens. This change would align the application with security best practices established in OWASP Top Ten and NIST cybersecurity guidelines for web application development. Organizations should also consider implementing additional logging mechanisms to detect unauthorized cancellation attempts and monitor for suspicious patterns of order modifications that could indicate exploitation attempts. The vulnerability serves as a reminder of the importance of proper HTTP method usage in web applications and the critical need for comprehensive security testing throughout the software development lifecycle.
This type of vulnerability is particularly concerning in business-critical applications like djangoSIGE, where financial transactions and inventory management are at stake. The ease of exploitation through simple HTML tags makes it accessible to attackers with minimal technical expertise, while the potential impact on business operations can be severe. Security teams should prioritize immediate patching of affected versions and conduct thorough security assessments of similar applications within their environment that may exhibit comparable architectural flaws in handling state-changing operations through GET requests rather than POST methods.