CVE-2026-7574

Anthropic Claude Desktop Cowork VM image handling (confirmed across v1.1348.0 through v1.2278.0, including v1.1348.0, v1.1617.0, and v1.2278.0) validates only file presence and a version marker string before booting rootfs.img, but does not verify image content integrity at time-of-use. A local attacker with unprivileged code execution as the victim macOS user can modify the VM root filesystem image and have it trusted on subsequent Cowork VM boots, enabling persistent arbitrary code execution in the VM and access to host-mounted directories. The estimated CWE mapping is CWE-353 (Missing Support for Integrity Check).

CVSS v3 8.7 HIGH

8.7^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.0 / Impact : 6.0

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact LOW

Scope CHANGED

References

Link	Resource
https://cfp.recon.cx/recon-2026/talk/DZUQYU/
https://takeonme.org/gcves/GCVE-1337-2026-00000000000000000000000000000000000000000000000001110111111101011111111110000000000000000000000000000000000000000000000000000001010

Configurations

No configuration.

History

25 Oct 2026, 23:10

Type	Values Removed	Values Added
Summary		(es) Gestión de imágenes de VM de Anthropic Claude Desktop Cowork (confirmado en las versiones v1.1348.0 a v1.2278.0, incluyendo v1.1348.0, v1.1617.0 y v1.2278.0) valida solo la presencia del archivo y una cadena de marcador de versión antes de arrancar rootfs.img, pero no verifica la integridad del contenido de la imagen en el momento de su uso. Un atacante local con ejecución de código sin privilegios como el usuario de macOS víctima puede modificar la imagen del sistema de archivos raíz de la VM y hacer que sea de confianza en los arranques posteriores de la VM de Cowork, lo que permite la ejecución de código arbitrario persistente en la VM y el acceso a directorios montados en el host. La asignación CWE estimada es CWE-353 (Falta de soporte para la verificación de integridad).

Information

Published : 2026-06-24 00:16

Updated : 2026-10-25 23:10

NVD link : CVE-2026-7574

Mitre link : CVE-2026-7574

CVE.ORG link : CVE-2026-7574

JSON object : View

Products Affected

No product.

CWE

CWE-353

Missing Support for Integrity Check

{"id": "CVE-2026-7574", "cveTags": [], "metrics": {"ssvcV203": [{"source": "cve@takeonme.org", "ssvcData": {"role": "CNA", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3"}}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-7574", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-06-24T13:03:53.789182Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "cve@takeonme.org", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.7, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 2.0}]}, "affected": [{"source": "cve@takeonme.org", "affectedData": [{"vendor": "Anthropic", "product": "Claude Desktop Cowork", "versions": [{"status": "affected", "version": "1.1348.0", "versionType": "semver", "lessThanOrEqual": "1.2278.0"}], "defaultStatus": "unaffected"}]}], "published": "2026-06-24T00:16:34.173", "references": [{"url": "https://cfp.recon.cx/recon-2026/talk/DZUQYU/", "source": "cve@takeonme.org"}, {"url": "https://takeonme.org/gcves/GCVE-1337-2026-00000000000000000000000000000000000000000000000001110111111101011111111110000000000000000000000000000000000000000000000000000001010", "source": "cve@takeonme.org"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "cve@takeonme.org", "description": [{"lang": "en", "value": "CWE-353"}]}], "descriptions": [{"lang": "en", "value": "Anthropic Claude Desktop Cowork VM image handling (confirmed across v1.1348.0 through v1.2278.0, including v1.1348.0, v1.1617.0, and v1.2278.0) validates only file presence and a version marker string before booting rootfs.img, but does not verify image content integrity at time-of-use. A local attacker with unprivileged code execution as the victim macOS user can modify the VM root filesystem image and have it trusted on subsequent Cowork VM boots, enabling persistent arbitrary code execution in the VM and access to host-mounted directories. The estimated CWE mapping is CWE-353 (Missing Support for Integrity Check)."}, {"lang": "es", "value": "Gesti\u00f3n de im\u00e1genes de VM de Anthropic Claude Desktop Cowork (confirmado en las versiones v1.1348.0 a v1.2278.0, incluyendo v1.1348.0, v1.1617.0 y v1.2278.0) valida solo la presencia del archivo y una cadena de marcador de versi\u00f3n antes de arrancar rootfs.img, pero no verifica la integridad del contenido de la imagen en el momento de su uso. Un atacante local con ejecuci\u00f3n de c\u00f3digo sin privilegios como el usuario de macOS v\u00edctima puede modificar la imagen del sistema de archivos ra\u00edz de la VM y hacer que sea de confianza en los arranques posteriores de la VM de Cowork, lo que permite la ejecuci\u00f3n de c\u00f3digo arbitrario persistente en la VM y el acceso a directorios montados en el host. La asignaci\u00f3n CWE estimada es CWE-353 (Falta de soporte para la verificaci\u00f3n de integridad)."}], "lastModified": "2026-10-25T23:10:00.167", "sourceIdentifier": "cve@takeonme.org"}