CVE-2026-22786

Gin-vue-admin has arbitrary file upload vulnerability caused by path traversal

Gin-vue-admin <= v2.8.7 has a path traversal vulnerability in the breakpoint resume upload functionality. Attacker can upload any files on any directory.

Path traversal vulnerabilities occur when a web application accepts user-supplied file paths without proper validation, allowing attackers to access or write files outside the intended directory. In the breakpoint_continue.go file, the MakeFile function accepts a fileName parameter through the /fileUploadAndDownload/breakpointContinueFinish API endpoint and directly concatenates it with the base directory path (./fileDir/) using os.OpenFile() without any validation for directory traversal sequences (e.g., ../).

Notably, while the related makeFileContent function in the same file properly validates the fileName parameter by checking for .. sequences, the MakeFile function lacks this security control, indicating an inconsistent security implementation.

An attacker with file upload privileges (role ID 888 - super administrator) could exploit this vulnerability by:

First uploading file chunks through the /fileUploadAndDownload/breakpointContinue endpoint (which has proper validation)

Then calling the /fileUploadAndDownload/breakpointContinueFinish endpoint with a malicious fileName parameter containing path traversal sequences (e.g., ../../../tmp/malicious.txt)

This could lead to:
Arbitrary file creation, application process, Configuration file overwriting, Potential Remote Code Execution......

Input manipulates file paths to reach files outside the intended directory, such as configuration or credential files. Typical impact: unauthorized file read or write outside the intended directory.

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1. What is CVE-2026-22786? CVE-2026-22786 is a high-severity path traversal vulnerability in github.com/flipped-aurora/gin-vue-admin (go), affecting versions <= 2.8.7. No fixed version is listed yet. Input manipulates file paths to reach files outside the intended directory, such as configuration or credential files.
2. Which versions of github.com/flipped-aurora/gin-vue-admin are affected by CVE-2026-22786? github.com/flipped-aurora/gin-vue-admin (go) versions <= 2.8.7 is affected.
3. Is there a fix for CVE-2026-22786? No fixed version is listed for CVE-2026-22786 yet. Monitor the advisory for updates and apply mitigations in the interim.
4. Is CVE-2026-22786 exploitable, and should I be worried? Whether CVE-2026-22786 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
5. What actually determines whether CVE-2026-22786 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
6. How do I fix CVE-2026-22786? No fixed version is listed yet. In the interim: Resolve the canonical path after applying any user-supplied input, and verify it remains within the intended directory before accessing it.

Other vulnerabilities in github.com/flipped-aurora/gin-vue-admin