CVE-2026-3103

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true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A logic error in the remove_password() function in Checkmk GmbH's Checkmk versions <2.4.0p23, <2.3.0p43, and 2.2.0 (EOL) allows a low-privileged user to cause data loss."}, {"lang": "es", "value": "Un error de l\u00f3gica en la funci\u00f3n remove_password() en las versiones de Checkmk de Checkmk GmbH &lt;2.4.0p23, &lt;2.3.0p43 y 2.2.0 (EOL) permite a un usuario de bajo privilegio causar p\u00e9rdida de datos."}], "id": "CVE-2026-3103", "lastModified": "2026-06-17T10:43:02.903", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.5, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.3, "baseSeverity": "MEDIUM", "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": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/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": "LOW", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security@checkmk.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-3103", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-04T14:07:07.329446Z", "version": "2.0.3"}}]}, "published": "2026-03-04T14:16:14.857", "references": [{"source": "security@checkmk.com", "tags": ["Mitigation", "Vendor Advisory"], "url": "https://checkmk.com/werk/19041"}], "sourceIdentifier": "security@checkmk.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-863"}], "source": "security@checkmk.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[2.4.0,2.4.0p23)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[2.3.0,2.3.0p43)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.2.0"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Checkmk", "source": "cna", "vendor": "Checkmk GmbH"}, "product": "checkmk", "vendor": "checkmk"}], "analysis": {"en": {"generated_at": "2026-04-16T13:34:34.538991+00:00", "value": {"mitigation_remediation": ["Upgrade to Checkmk 2.4.0p23 or later, or to 2.3.0p43 or later if on that branch.", "If an upgrade is not immediately possible, restrict the remove_password API endpoint so that only administrators can call it and deny permissions for all other users.", "Review and revoke any non\u2011admin privileges that presently allow password deletion via the API.", "Continuously monitor REST API logs for anomalous password deletion activity to detect potential misuse."], "summary": {"action": "Patch promptly", "impact": "Data loss (password deletion)"}, "threat_synthesis": {"affected_systems": "Checkmk GmbH:Checkmk versions below 2.4.0p23, below 2.3.0p43, and the 2.2.0 series (EOL) are affected. These include all builds of 2.4.0 up to p22, 2.3.0 up to p42, and any 2.2.0 release.", "description_and_impact": "A logic error in the remove_password() function in Checkmk allows a low\u2011privileged user to cause data loss by deleting password records. The flaw is exercised through the REST API and results in the permanent removal of valid credentials, jeopardizing the integrity of user authentication data but not directly exposing confidential data or enabling code execution.", "risk_and_exploitability": "The CVSS score of 5.3 reflects moderate severity, and the EPSS score of <1% indicates a low likelihood of exploitation in the wild. The vulnerability is not listed in CISA\u2019s KEV catalog. Likely attack progression involves a low\u2011privileged authenticated user sending a REST API request to remove_password(). Because the flaw is a logic error rather than an injection or buffer overflow, it requires only that the attacker has API access and can manipulate the endpoint."}}}}, "created": "2026-03-04T21:03:30.691778+00:00", "updated": "2026-04-16T13:45:21.944188+00:00", "vendors": ["checkmk", "checkmk$PRODUCT$checkmk"]}