CVE-2026-5023 DeDeveloper23 codebase-mcp RepoMix codebase.ts saveCodebase os command injection
Local attackers can execute arbitrary OS commands via the saveCodebase function in the codebase-mcp developer tool.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-5023?
CVE-2026-5023 is a medium-severity command injection vulnerability in DeDeveloper23 codebase-mcp, published on 29 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability has been found in DeDeveloper23 codebase-mcp up to 3ec749d237dd8eabbeef48657cf917275792fde6. This vulnerability affects the function getCodebase/getRemoteCodebase/saveCodebase of the file src/tools/codebase.ts of the component RepoMix Command Handler. Such manipulation leads to os command injection. The attack needs to be performed locally. The exploit has been disclosed to the public and may be used. This product implements a rolling release for ongoing delivery, which means version information for affected or updated releases is unavailable. The project was informed of the problem early through an issue report but has not responded yet.
Which versions are affected by CVE-2026-5023?
How do I fix CVE-2026-5023?
No fix has been published for CVE-2026-5023 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-5023 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5023 exists.
Sources
Also known as GHSA-cm69-52gj-g4j6.