{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-20638", "assignerOrgId": "286789f9-fbc2-4510-9f9a-43facdede74c", "state": "PUBLISHED", "assignerShortName": "apple", "dateReserved": "2025-11-11T14:43:07.861Z", "datePublished": "2026-02-11T22:58:34.881Z", "dateUpdated": "2026-04-02T18:19:24.699Z"}, "containers": {"cna": {"problemTypes": [{"descriptions": [{"lang": "en", "description": "A user with Live Caller ID app extensions turned off could have identifying information leaked to the extensions"}]}], "affected": [{"vendor": "Apple", "product": "iOS and iPadOS", "versions": [{"version": "0", "status": "affected", "lessThan": "26.3", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "A logic issue was addressed with improved checks. This issue is fixed in iOS 26.3 and iPadOS 26.3. A user with Live Caller ID app extensions turned off could have identifying information leaked to the extensions."}], "references": [{"url": "https://support.apple.com/en-us/126346"}], "providerMetadata": {"orgId": "286789f9-fbc2-4510-9f9a-43facdede74c", "shortName": "apple", "dateUpdated": "2026-04-02T18:19:24.699Z"}}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-284", "lang": "en", "description": "CWE-284 Improper Access Control"}]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-02-12T19:34:05.637642Z", "id": "CVE-2026-20638", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-02-12T19:34:32.280Z"}}]}}

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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*", "matchCriteriaId": "73ED2212-C513-4BE8-8EDB-40DF4323558E", "versionEndExcluding": "26.3", "vulnerable": true}, {"criteria": "cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*", "matchCriteriaId": "DEC63AFD-9C97-45CD-80CF-CC60DF064838", "versionEndExcluding": "26.3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A logic issue was addressed with improved checks. This issue is fixed in iOS 26.3 and iPadOS 26.3. A user with Live Caller ID app extensions turned off could have identifying information leaked to the extensions."}], "id": "CVE-2026-20638", "lastModified": "2026-02-13T14:48:06.043", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2026-02-11T23:16:06.923", "references": [{"source": "product-security@apple.com", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://support.apple.com/en-us/126346"}], "sourceIdentifier": "product-security@apple.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-284"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,26.3)"}}], "product": "ios_and_ipados", "vendor": "apple"}], "analysis": {"en": {"generated_at": "2026-04-15T20:58:21.284437+00:00", "value": {"mitigation_remediation": ["Upgrade the device to iOS 26.3 or iPadOS 26.3 to apply the vendor fix", "Ensure Live Caller ID app extensions remain enabled during use", "If an upgrade is delayed, temporarily disable or uninstall the problematic Live Caller ID extensions to prevent data leakage"], "summary": {"action": "Patch", "impact": "Information Disclosure"}, "threat_synthesis": {"affected_systems": "Clients affected include Apple iOS and iPadOS devices running any version prior to iOS 26.3 and iPadOS 26.3. The issue specifically impacts users who have turned off Live Caller ID app extensions.", "description_and_impact": "A logic flaw in iOS and iPadOS causes identifying information to be leaked to Live Caller ID app extensions when those extensions are disabled. The vulnerability stems from insufficient access control checks, allowing the extensions to access data they should not when the app\u2019s extension is turned off. This results in unintended disclosure of user identifiers.", "risk_and_exploitability": "The CVSS score of 5.5 indicates moderate severity, while the extremely low EPSS (<1%) suggests limited current exploitation likelihood. The vulnerability is not listed in the CISA KEV catalog. Based on the description, the attack vector is local to the device; an attacker would need physical or temporary control over the device or access to the user\u2011controlled Live Caller ID extensions. No remote exploitation vectors are described in the official data."}}}}, "created": "2026-02-12T09:02:37.405776+00:00", "title": "Live Caller ID App Extension Information Leakage on iOS/iPadOS when Extension Disabled", "updated": "2026-04-15T21:00:09.965466+00:00", "vendors": ["apple", "apple$PRODUCT$ios_and_ipados"]}