How severe is CVE-2026-5023?

CVE-2026-5023 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-5023 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-5023?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-5023 have an EU (EUVD) identifier?

Yes. CVE-2026-5023 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16966.

When was CVE-2026-5023 published?

CVE-2026-5023 was published on 2026-03-29 and last updated on 2026-06-17.

CVE-2026-5023

CVE-2026-5023 is a medium-severity vulnerability with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-77.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 4.3
CVSS v4: 1.9
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-16966
Weakness: CWE-77
Published: 2026-03-29
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-5023?: 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.
How severe is CVE-2026-5023?: CVE-2026-5023 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-5023 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-5023?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-5023 have an EU (EUVD) identifier?: Yes. CVE-2026-5023 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16966.
When was CVE-2026-5023 published?: CVE-2026-5023 was published on 2026-03-29 and last updated on 2026-06-17.

References

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