EUVD-2026-53927
GHSA-pcgr-7p2p-x7w8
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/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:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable endpoint requires low-privilege authentication (PR:L); no scope change as subsequent-system impact is absent per CVSS 4.0 SC/SI/SA:N.
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/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:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
4DescriptionCVE.org
A vulnerability has been found in MissionSquad mcp-api up to 1.11.8. The impacted element is the function this.packageService.installPackage of the file src/controllers/packages.ts of the component NPM Package Version Handler. The manipulation leads to command injection. It is possible to initiate the attack remotely. Upgrading to version 1.11.9 is sufficient to resolve this issue. The identifier of the patch is a40f54d4533ba6618e1749383a245900eeb024c1. The affected component should be upgraded.
AnalysisAI
Command injection in MissionSquad mcp-api through version 1.11.8 enables remote authenticated users to execute arbitrary OS-level commands on the host by supplying a crafted version string to the NPM package installation endpoint. The root cause is string interpolation of unvalidated user input into a Node.js exec() call, which passes the resulting string through a shell interpreter - making shell metacharacters in the version parameter an effective injection vector. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires low-privilege authenticated access to the mcp-api HTTP API (PR:L per CVSS 4.0 vector). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 base score of 5.3 (Medium) is consistent with the attack profile: network-reachable, low complexity, but gated behind low-privilege authentication (PR:L), with impact confined to the vulnerable system (SC:N/SI:N/SA:N). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade MissionSquad mcp-api to version 1.11.9, the vendor-released patch confirmed at https://github.com/MissionSquad/mcp-api/releases/tag/v1.11.9. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-77 – Command Injection
View allSame technique Command Injection
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External POC / Exploit Code
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