A weakness has been identified in johnhuang316 code-index-mcp up to 2.14.0. Affected is the function is_safe_regex_pattern of the component search_code_advanced. Executing a manipulation of the argument regex can lead to inefficient regular expression complexity. It is possible to launch the attack remotely. The exploit has been made available to the public and could be used for attacks. Upgrading to version 2.14.1 is able to address this issue. This patch is called 25bc02fac74051ddae15ce79e952f00211b1ea6b. Upgrading the affected component is recommended.
Weakness
The product does not properly control the allocation and maintenance of a limited resource.
Potential Mitigations
Mitigation of resource exhaustion attacks requires that the target system either:
The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.
The second solution is simply difficult to effectively institute – and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/147.html
- https://cwe.mitre.org/data/definitions/227.html
- https://cwe.mitre.org/data/definitions/492.html
References
- https://github.com/johnhuang316/code-index-mcp/
- https://github.com/johnhuang316/code-index-mcp/commit/25bc02fac74051ddae15ce79e952f00211b1ea6b
- https://github.com/johnhuang316/code-index-mcp/issues/84
- https://github.com/johnhuang316/code-index-mcp/releases/tag/v2.14.1
- https://vuldb.com/cve/CVE-2026-10692
- https://vuldb.com/submit/830786
- https://vuldb.com/vuln/367961
- https://vuldb.com/vuln/367961/cti