CVE-2026-34596

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-34596", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-03-30T17:15:52.499Z", "datePublished": "2026-05-05T19:34:50.986Z", "dateUpdated": "2026-05-07T03:55:42.959Z"}, "containers": {"cna": {"title": "Sandboxie-Plus local privilege escalation via TOCTOU race condition in UpdUtil addon installation", "problemTypes": [{"descriptions": [{"cweId": "CWE-367", "lang": "en", "description": "CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-xjvp-63f2-v585", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-xjvp-63f2-v585"}], "affected": [{"vendor": "sandboxie-plus", "product": "Sandboxie", "versions": [{"version": "< 1.17.3", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-05T19:34:50.986Z"}, "descriptions": [{"lang": "en", "value": "Sandboxie-Plus is an open source sandbox-based isolation software for Windows. In versions 1.17.2 and earlier, a Time-of-Check-to-Time-of-Use (TOCTOU) race condition exists during addon installation. When a user installs an addon through the SandMan interface, UpdUtil.exe is spawned as SYSTEM by SbieSvc but stages files in the user-writable %TEMP%\\sandboxie-updater directory. After UpdUtil verifies file hashes against the signed addon manifest, install.bat extracts files.cab and executes config.exe from its contents. Between hash verification and extraction, an unprivileged user can replace files.cab with a crafted cabinet containing a malicious executable, which is then run as SYSTEM. No UAC prompt is required.\n\nThis issue has been fixed in version 1.17.3."}], "source": {"advisory": "GHSA-xjvp-63f2-v585", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-xjvp-63f2-v585", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-06T00:00:00+00:00", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3", "id": "CVE-2026-34596"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-07T03:55:42.959Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-34596", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-05-06T12:44:08.627727Z"}}}], "references": [{"url": "https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-xjvp-63f2-v585", "tags": ["exploit"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-06T12:44:22.911Z"}}], "cna": {"title": "Sandboxie-Plus local privilege escalation via TOCTOU race condition in UpdUtil addon installation", "source": {"advisory": "GHSA-xjvp-63f2-v585", "discovery": "UNKNOWN"}, "metrics": [{"cvssV4_0": {"version": "4.0", "baseScore": 5.4, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "userInteraction": "ACTIVE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH"}}], "affected": [{"vendor": "sandboxie-plus", "product": "Sandboxie", "versions": [{"status": "affected", "version": "< 1.17.3"}]}], "references": [{"url": "https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-xjvp-63f2-v585", "name": "https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-xjvp-63f2-v585", "tags": ["x_refsource_CONFIRM"]}], "descriptions": [{"lang": "en", "value": "Sandboxie-Plus is an open source sandbox-based isolation software for Windows. In versions 1.17.2 and earlier, a Time-of-Check-to-Time-of-Use (TOCTOU) race condition exists during addon installation. When a user installs an addon through the SandMan interface, UpdUtil.exe is spawned as SYSTEM by SbieSvc but stages files in the user-writable %TEMP%\\sandboxie-updater directory. After UpdUtil verifies file hashes against the signed addon manifest, install.bat extracts files.cab and executes config.exe from its contents. Between hash verification and extraction, an unprivileged user can replace files.cab with a crafted cabinet containing a malicious executable, which is then run as SYSTEM. No UAC prompt is required.\n\nThis issue has been fixed in version 1.17.3."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-367", "description": "CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-05T19:34:50.986Z"}}}, "cveMetadata": {"cveId": "CVE-2026-34596", "state": "PUBLISHED", "dateUpdated": "2026-05-07T03:55:42.959Z", "dateReserved": "2026-03-30T17:15:52.499Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-05-05T19:34:50.986Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "Sandboxie", "vendor": "sandboxie-plus", "versions": [{"status": "affected", "version": "< 1.17.3"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:sandboxie-plus:sandboxie:*:*:*:*:plus:*:*:*", "matchCriteriaId": "69CB00B4-502D-4839-B404-93FA214C6978", "versionEndExcluding": "1.17.3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Sandboxie-Plus is an open source sandbox-based isolation software for Windows. In versions 1.17.2 and earlier, a Time-of-Check-to-Time-of-Use (TOCTOU) race condition exists during addon installation. When a user installs an addon through the SandMan interface, UpdUtil.exe is spawned as SYSTEM by SbieSvc but stages files in the user-writable %TEMP%\\sandboxie-updater directory. After UpdUtil verifies file hashes against the signed addon manifest, install.bat extracts files.cab and executes config.exe from its contents. Between hash verification and extraction, an unprivileged user can replace files.cab with a crafted cabinet containing a malicious executable, which is then run as SYSTEM. No UAC prompt is required.\n\nThis issue has been fixed in version 1.17.3."}, {"lang": "es", "value": "Sandboxie-Plus es un software de aislamiento de c\u00f3digo abierto basado en sandbox para Windows. En las versiones 1.17.2 y anteriores, existe una condici\u00f3n de carrera (TOCTOU) de Tiempo de Verificaci\u00f3n a Tiempo de Uso durante la instalaci\u00f3n de complementos. Cuando un usuario instala un complemento a trav\u00e9s de la interfaz de SandMan, UpdUtil.exe es iniciado como SYSTEM por SbieSvc pero almacena archivos en el directorio %TEMP%\\sandboxie-updater, que es escribible por el usuario. Despu\u00e9s de que UpdUtil verifica los hashes de los archivos contra el manifiesto de complemento firmado, install.bat extrae files.cab y ejecuta config.exe de su contenido. Entre la verificaci\u00f3n de hash y la extracci\u00f3n, un usuario sin privilegios puede reemplazar files.cab con un archivo cabinet manipulado que contiene un ejecutable malicioso, el cual es luego ejecutado como SYSTEM. No se requiere una solicitud de UAC.\n\nEste problema ha sido solucionado en la versi\u00f3n 1.17.3."}], "id": "CVE-2026-34596", "lastModified": "2026-07-24T22:10:00.140", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.4, "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": "ACTIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/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": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-34596", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-05-06T00:00:00+00:00", "version": "2.0.3"}}]}, "published": "2026-05-05T20:16:38.080", "references": [{"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-xjvp-63f2-v585"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-xjvp-63f2-v585"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-367"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.17.3)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Sandboxie", "source": "cna", "vendor": "sandboxie-plus"}, "product": "sandboxie", "vendor": "sandboxie-plus"}], "created": "2026-05-05T21:30:05.498190+00:00", "updated": "2026-05-05T21:30:05.739711+00:00", "vendors": ["sandboxie-plus", "sandboxie-plus$PRODUCT$sandboxie"]}