CVE-2026-22786 affects the flipped-aurora gin-vue-admin project, a backend management system built on Vue.js and Gin framework. Versions up to 2.8.7 contain a path traversal vulnerability in the breakpoint resume upload feature. Specifically, the vulnerability resides in the MakeFile function within breakpoint_continue.go, where the filename parameter received via the /fileUploadAndDownload/breakpointContinueFinish API endpoint is concatenated directly with the base directory path './fileDir/' using os.OpenFile() without any sanitization or validation against directory traversal sequences such as '../'. This lack of validation allows an attacker with legitimate file upload privileges to craft filenames containing traversal sequences, enabling them to write files outside the intended directory, potentially anywhere on the server filesystem. This can lead to arbitrary file upload, allowing attackers to place malicious files, overwrite critical files, or implant web shells, which can compromise confidentiality, integrity, and availability of the system. The vulnerability is classified under CWE-434 (Unrestricted Upload of File with Dangerous Type) and CWE-22 (Path Traversal). The CVSS v4.0 score is 7.3 (high severity), reflecting network attack vector, low attack complexity, no user interaction, but requiring privileges to upload files. No known exploits have been reported in the wild yet, but the vulnerability's nature makes it a prime target for exploitation once weaponized. The issue affects all deployments using gin-vue-admin versions up to 2.8.7, which are commonly used in enterprise and government backend management systems.

For European organizations, this vulnerability poses a significant risk especially for those using gin-vue-admin as part of their internal or external management infrastructure. Successful exploitation can lead to arbitrary file writes, enabling attackers to deploy web shells or malware, escalate privileges, exfiltrate sensitive data, or disrupt services. This can result in data breaches, operational downtime, and reputational damage. Critical sectors such as finance, healthcare, government, and manufacturing that rely on gin-vue-admin for administrative interfaces are particularly vulnerable. Given the high severity and ease of exploitation by any user with upload privileges, the threat could facilitate lateral movement within networks and persistent footholds. The absence of known exploits in the wild currently provides a window for proactive mitigation. However, the vulnerability's presence in open-source software used globally means European organizations must act swiftly to prevent potential targeted attacks or opportunistic exploitation by cybercriminals or state-sponsored actors.

1. Immediately upgrade gin-vue-admin to a version later than 2.8.7 once a patch is available from the vendor or community. 2. Until a patch is applied, restrict file upload permissions strictly to trusted users and roles to minimize exposure. 3. Implement server-side validation and sanitization of all file upload parameters, particularly the filename, to reject any directory traversal sequences such as '../' or absolute paths. 4. Employ application-layer controls to enforce allowed file types and sizes to reduce risk of malicious payloads. 5. Use containerization or sandboxing to isolate the file upload directory from critical system paths. 6. Monitor file system activity for unusual file creation or modification outside expected directories. 7. Conduct regular audits of uploaded files and system logs to detect potential exploitation attempts. 8. Harden server configurations to prevent execution of uploaded files in upload directories. 9. Educate developers and administrators about secure file handling practices to prevent similar vulnerabilities. 10. Deploy web application firewalls (WAFs) with rules to detect and block path traversal attack patterns targeting the vulnerable endpoint.