CVE-2026-121374

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{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Checkmk", "vendor": "Checkmk GmbH", "versions": [{"lessThan": "2.5.0p19", "status": "affected", "version": "2.5.0", "versionType": "semver"}, {"lessThan": "2.4.0p40", "status": "affected", "version": "2.4.0", "versionType": "semver"}, {"status": "affected", "version": "2.3.0", "versionType": "semver"}]}], "source": "security@checkmk.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Argument injection in the Kubernetes special agent in Checkmk <2.5.0p19, <2.4.0p40, and 2.3.0 (EOL) allows a user with permission to edit rules in at least one folder to write files to arbitrary locations writable by the site user via crafted node roles in the \"Exclude nodes based on their role\" rule option, leading to code execution as the site user."}], "id": "CVE-2026-121374", "lastModified": "2026-11-11T11:17:14.487", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 9.4, "baseSeverity": "CRITICAL", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security@checkmk.com", "type": "Secondary"}]}, "published": "2026-11-11T11:17:14.377", "references": [{"source": "security@checkmk.com", "url": "https://checkmk.com/werk/17994"}], "sourceIdentifier": "security@checkmk.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-88"}], "source": "security@checkmk.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[2.5.0,2.5.0p19)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[2.4.0,2.4.0p40)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.3.0"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Checkmk", "source": "cna", "vendor": "Checkmk GmbH"}, "product": "checkmk", "vendor": "checkmk"}], "created": "2026-11-11T22:15:21.804695+00:00", "updated": "2026-11-12T18:30:06.852223+00:00", "vendors": ["checkmk", "checkmk$PRODUCT$checkmk"]}