How severe is CVE-2026-5621?

CVE-2026-5621 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-2026-5621 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-5621?

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

Does CVE-2026-5621 have an EU (EUVD) identifier?

Yes. CVE-2026-5621 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19170.

When was CVE-2026-5621 published?

CVE-2026-5621 was published on 2026-04-06 and last updated on 2026-06-17.

CVE-2026-5621

CVE-2026-5621 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% (48th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-19170
Weakness: CWE-77
Published: 2026-04-06
Last modified: 2026-06-17

Description

A vulnerability was found in ChrisChinchilla Vale-MCP up to 0.1.0. Affected by this vulnerability is an unknown functionality of the file src/index.ts of the component HTTP Interface. The manipulation of the argument config_path results in os command injection. Attacking locally is a requirement. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

Frequently asked questions

What is CVE-2026-5621?: A vulnerability was found in ChrisChinchilla Vale-MCP up to 0.1.0. Affected by this vulnerability is an unknown functionality of the file src/index.ts of the component HTTP Interface. The manipulation of the argument config_path results in os command injection. Attacking locally is a requirement. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.
How severe is CVE-2026-5621?: CVE-2026-5621 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-2026-5621 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-5621?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-5621 have an EU (EUVD) identifier?: Yes. CVE-2026-5621 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19170.
When was CVE-2026-5621 published?: CVE-2026-5621 was published on 2026-04-06 and last updated on 2026-06-17.

References

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