CVE-2026-46562

{"id": "CVE-2026-46562", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-46562", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-07-16T18:01:46.175576Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "yamcs", "product": "yamcs", "versions": [{"status": "affected", "version": "< 5.12.7"}]}]}], "published": "2026-07-16T17:16:56.953", "references": [{"url": "https://github.com/yamcs/yamcs/commit/3c550348f866af4675d2ba4a51d8d12b7c7c6011", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/yamcs/yamcs/commit/4ff8fda642ea8c3309a4d3f379aa77b763148992", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.7", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.0", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/yamcs/yamcs/security/advisories/GHSA-vmwp-vh32-rj75", "tags": ["Exploit", "Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/yamcs/yamcs/security/advisories/GHSA-vmwp-vh32-rj75", "tags": ["Exploit", "Vendor Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-94"}, {"lang": "en", "value": "CWE-95"}, {"lang": "en", "value": "CWE-470"}]}], "descriptions": [{"lang": "en", "value": "Yamcs is a mission control framework. Prior to 5.12.7, the Nashorn ScriptEngine used to evaluate user-supplied JavaScript algorithm text in yamcs-core/src/main/java/org/yamcs/algorithms/ScriptAlgorithmExecutorFactory.java was constructed without a ClassFilter, so a user with the ChangeMissionDatabase privilege could override an algorithm through the MdbOverrideApi.updateAlgorithm endpoint and supply JavaScript that reaches arbitrary Java classes (for example Java.type(\"java.lang.Runtime\").getRuntime().exec(...)) to execute arbitrary OS commands as the Yamcs process; in the default configuration with no security.yaml the built-in guest user has superuser=true, making the issue reachable without authentication. This issue is fixed in versions 5.12.7 and 5.13.0, which disable algorithm editing by default."}], "lastModified": "2026-07-20T01:53:17.737", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:spaceapplications:yamcs:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1F836127-88FB-4BD4-AD07-FE5B324349CD", "versionEndExcluding": "5.12.7"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}