Package Instance

CodeChecker is an analyzer tooling, defect database and viewer extension for the Clang Static Analyzer and Clang Tidy. 
Authentication bypass occurs when the API URL ends with Authentication. This bypass allows superuser access to all API endpoints other than Authentication. These endpoints include the ability to add, edit, and remove products, among others. All endpoints, apart from the /Authentication is affected by the vulnerability.

This issue affects CodeChecker: through 6.24.1.

CodeChecker is an analyzer tooling, defect database and viewer extension for the Clang Static Analyzer and Clang Tidy. 




CodeChecker versions up to 6.26.1 contain a buffer overflow vulnerability in the internal ldlogger library, which is executed by the CodeChecker log command.





This issue affects CodeChecker: through 6.26.1.

CodeChecker is an analyzer tooling, defect database and viewer extension for the Clang Static Analyzer and Clang Tidy. 
Cross-site request forgery allows an unauthenticated attacker to hijack the authentication of a logged in user, and use the web API with the same permissions, including but not limited to adding, removing or editing products. The attacker needs to know the ID of the available products to modify or delete them. The attacker cannot directly exfiltrate data (view) from CodeChecker, due to being limited to form-based CSRF.

This issue affects CodeChecker: through 6.24.4.

CodeChecker is an analyzer tooling, defect database and viewer extension for the Clang Static Analyzer and Clang Tidy. Zip files uploaded to the server endpoint of `CodeChecker store` are not properly sanitized. An attacker, using a path traversal attack, can load and display files on the machine of `CodeChecker server`. The vulnerable endpoint is `/Default/v6.53/CodeCheckerService@massStoreRun`. The path traversal vulnerability allows reading data on the machine of the `CodeChecker server`, with the same permission level as the `CodeChecker server`.
The attack requires a user account on the `CodeChecker server`, with permission to store to a server, and view the stored report. This vulnerability has been patched in version 6.23.

CodeChecker open redirect when URL contains multiple slashes after the product name
Summary
---

CodeChecker versions up to 6.24.5 contain an open redirect vulnerability due to missing protections against multiple slashes after the product name in the URL's path segment.  This results in bypassing protections against CVE-2021-28861, leading to the same open redirect pathway.

Details
---

CodeChecker processes GET requests by first rewriting the path segment of the URL, and then passing the rewritten URL to the webserver framework.
When trimming the product name from the URL, no sanitization was performed on the remaining URL, which reintroduced the same issue as CVE-2021-28861, leading to the same open redirect pathway using URLs such as `/Default//attacker.com/%2f..`.

Impact
---

The vulnerability allows an attacker to create a hyperlink that looks like a legitimate CodeChecker URL, but redirects to an attacker-supplied website when clicked.

CodeChecker is an analyzer tooling, defect database and viewer extension for the Clang Static Analyzer and Clang Tidy. 
Authentication method confusion allows logging in as the built-in root user from an external service. The built-in root user up until 6.24.1 is generated in a weak manner, cannot be disabled, and has universal access.This vulnerability allows an attacker who can create an account on an enabled external authentication service, to log in as the root user, and access and control everything that can be controlled via the web interface. The attacker needs to acquire the username of the root user to be successful.

This issue affects CodeChecker: through 6.24.1.

Codechecker has an authentication bypass for certain API calls
### Summary
Authentication bypass occurs when the URL ends with Authentication with certain function calls. This bypass allows assigning arbitrary permissions to any existing user in CodeChecker.

### Details

The following functions are affected under the Authentication endpoint: `getAuthorisedNames`, `getPermissionsForUser`, `hasPermission`, `addPermission`, and `removePermission`.

The vulnerability allows unauthenticated users to execute these function calls with arbitrary arguments.
In the logs, the exploit shows as follows:
```
[INFO 2026-04-23 21:23] - 127.0.0.1:42654 -- [Anonymous] POST /v6.67/Authentication@getAuthorisedNames
[INFO 2026-04-23 21:23] - 127.0.0.1:42654 -- [Anonymous] POST /v6.67/Authentication@addPermission
```

### Impact
An attacker with a CodeChecker user can effectively acquire superuser permissions by calling these endpoints.

### Patch
A patch is available at https://github.com/Ericsson/codechecker/releases/tag/v6.27.4.