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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "matchCriteriaId": "0488A377-7971-4703-8823-05BF1E23CF48", "versionEndExcluding": "26.3", "versionStartIncluding": "26.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A package validation issue was addressed by blocking the vulnerable package. This issue is fixed in macOS Tahoe 26.3. An app may be able to gain root privileges."}], "id": "CVE-2026-20658", "lastModified": "2026-02-25T19:43:20.767", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2026-02-11T23:16:08.530", "references": [{"source": "product-security@apple.com", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://support.apple.com/en-us/126348"}], "sourceIdentifier": "product-security@apple.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,26.3)"}}], "product": "macos", "vendor": "apple"}], "analysis": {"en": {"generated_at": "2026-04-16T00:52:55.390781+00:00", "value": {"mitigation_remediation": ["Upgrade macOS to version 26.3 or later to receive the fix", "Apply any available Apple security updates that address this package validation flaw", "Verify that the vulnerable package is blocked or quarantined in the system\u2019s security settings", "If a patch cannot be applied immediately, monitor system activity for signs of privilege escalation attempts and investigate any unauthenticated apps"], "summary": {"action": "Immediate Patch", "impact": "Privilege Escalation to Root"}, "threat_synthesis": {"affected_systems": "Apple macOS Tahoe versions prior to 26.3 are affected. The issue was resolved in macOS Tahoe 26.3, so newer releases are not impacted.", "description_and_impact": "A package validation issue in macOS Tahoe allows a malicious application to obtain root privileges. The flaw was mitigated by blocking the vulnerable package, but until the fix is applied, an app may be able to elevate its privileges to system level.", "risk_and_exploitability": "The vulnerability carries a CVSS score of 7.8, indicating high severity. The EPSS score is below 1%, suggesting a low probability of exploitation at present. It is not listed in the CISA KEV catalog. Based on the description, the attack vector is likely local, requiring the presence of a malicious app capable of triggering the package validation flaw to achieve privilege escalation."}}}}, "created": "2026-02-12T09:02:28.717751+00:00", "title": "macOS Package Validation Privilege Escalation", "updated": "2026-04-16T01:00:19.956945+00:00", "vendors": ["apple", "apple$PRODUCT$macos"], "weaknesses": ["CWE-269"]}