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CVE-2026-25660

Authentication bypass for certain API calls

9.3 Critical

CodeChecker is an analyzer tooling, defect database and viewer extension for the Clang Static Analyzer and Clang Tidy. Authentication bypass occurs when the URL ends with Authentication with certain function calls.  This bypass allows assigning arbitrary permission to any user existing in CodeChecker.

This issue affects CodeChecker: through 6.27.3.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.45%Up 0.4 points since Apr 25, 2026
90%50%10%1%

What each source reports

CVE List Score used 9.3

Authentication bypass for certain API calls

CodeChecker is an analyzer tooling, defect database and viewer extension for the Clang Static Analyzer and Clang Tidy. Authentication bypass occurs when the URL ends with Authentication with certain function calls.  This bypass allows assigning arbitrary permission to any user existing in CodeChecker.

This issue affects CodeChecker: through 6.27.3.

Record
CVE-2026-25660
CVSS 4.0
9.3 CriticalCVSS: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/S:N/AU:Y/R:U/V:C/RE:M/U:Red
Weakness
CWE-290, CWE-863
Updated
2026-11-02
EUVDEUVD-2026-25417 9.3

CodeChecker is an analyzer tooling, defect database and viewer extension for the Clang Static Analyzer and Clang Tidy. Authentication bypass occurs when the URL ends with Authentication with certain function calls.  This bypass allows assigning arbitrary permission to any user existing in CodeChecker.

This issue affects CodeChecker: through 6.27.3.

Record
EUVD-2026-25417
CVSS 4.0
9.3 CriticalCVSS: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/S:N/AU:Y/R:U/V:C/RE:M/U:Red
Updated
2026-11-02
GitHub AdvisoriesGHSA-4v9x-cqc5-j645 9.3

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.

Record
GHSA-4v9x-cqc5-j645
CVSS 4.0
9.3 CriticalCVSS: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-290, CWE-863
Updated
2026-11-02
NVD 9.3

CodeChecker is an analyzer tooling, defect database and viewer extension for the Clang Static Analyzer and Clang Tidy. Authentication bypass occurs when the URL ends with Authentication with certain function calls.  This bypass allows assigning arbitrary permission to any user existing in CodeChecker.

This issue affects CodeChecker: through 6.27.3.

Record
CVE-2026-25660
CVSS 4.0
9.3 CriticalCVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:Y/R:U/V:C/RE:M/U:Red
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-290, CWE-863
Updated
2026-11-02
OSV 9.3

Authentication bypass for certain API calls

CodeChecker is an analyzer tooling, defect database and viewer extension for the Clang Static Analyzer and Clang Tidy. Authentication bypass occurs when the URL ends with Authentication with certain function calls.  This bypass allows assigning arbitrary permission to any user existing in CodeChecker.

This issue affects CodeChecker: through 6.27.3.

Record
CVE-2026-25660
CVSS 4.0
9.3 CriticalCVSS: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/S:N/AU:Y/R:U/V:C/RE:M/U:Red
Weakness
CWE-290, CWE-863
Updated
2026-11-02
OSVGHSA-4v9x-cqc5-j645 9.3

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.

Record
GHSA-4v9x-cqc5-j645
CVSS 4.0
9.3 CriticalCVSS: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-290, CWE-863
Updated
2026-11-02
OSVPYSEC-2026-317 9.3

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.

Record
PYSEC-2026-317
CVSS 4.0
9.3 CriticalCVSS: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
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
codechecker
PyPI
 through 6.27.3 None known
codechecker
PyPI
 through 6.27.3, plus listed versions
6.16.06.16.0a16.17.06.18.06.18.1
Show 25 moreShow less
6.18.26.19.06.19.16.20.06.20.0rc16.21.06.21.0rc16.22.06.22.0rc16.22.16.22.26.22.2.post16.23.06.23.0rc26.23.16.24.06.24.16.24.26.24.46.25.06.25.16.26.06.26.16.26.26.27.1
 None known

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-25660 is a critical vulnerability (CVSS 9.3) in Ericsson Codechecker, published April 24, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.45%, the 39th percentile. No source names a fixed version.

References

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