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@addPermissionImpact
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | codechecker | <= 6.27.3 | no fix |
References
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P- Weakness (CWE)
CWE-290, CWE-863- Platform
- Python (PyPI)
- Package
codechecker- Disclosed
- 05.05.2026
- Updated
- 11.10.2026 12:20
Sources and licenses
OSV / GitHub Advisory Database - GHSA-4v9x-cqc5-j645 - CC BY 4.0
OSV / GitHub Advisory Database - PYSEC-2026-317 - PyPA Advisory Database; CC BY 4.0
Vulnerability history: codechecker
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 8
- First → latest
- 01.2022 05.2026
- Without a fix
- 1
- Exploited in attacks
- 0
Severity breakdown
- Critical 3
- High 1
- Medium 4
Disclosures per year
- 2022: 1
- 2023: 0
- 2024: 3
- 2025: 3
- 2026: 1
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Codechecker has an authentication bypass for certain API calls this entry
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