CVE-2026-7574: CWE-353 Missing support for integrity check in Anthropic Claude Desktop Cowork
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).
AI Analysis
Technical Summary
CVE-2026-7574 affects Anthropic Claude Desktop Cowork by failing to verify the integrity of the VM root filesystem image before booting. The product validates only the presence of the rootfs.img file and a version marker string but does not perform content integrity checks. This allows a local attacker with unprivileged code execution on the macOS host user account to modify the VM image, resulting in persistent arbitrary code execution within the VM environment and unauthorized access to host-mounted directories. The vulnerability is confirmed in version 1.1348.0 and related versions up to 1.2278.0. No official patch or remediation has been documented as of the published date.
Potential Impact
A local attacker with unprivileged access to the victim macOS user account can modify the VM root filesystem image to execute arbitrary code persistently within the VM. This also enables the attacker to access directories mounted from the host system, potentially leading to data compromise and further system intrusion. The vulnerability compromises confidentiality, integrity, and availability within the affected VM environment.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict local user access to prevent unauthorized modification of the VM root filesystem image. Monitor for updates from Anthropic regarding patches or mitigations addressing this integrity verification issue.
CVE-2026-7574: CWE-353 Missing support for integrity check in Anthropic Claude Desktop Cowork
Description
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 v3.1
Score 8.7high
Affected software
pkg:github/anthropic/claude-desktop-coworkRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-7574 affects Anthropic Claude Desktop Cowork by failing to verify the integrity of the VM root filesystem image before booting. The product validates only the presence of the rootfs.img file and a version marker string but does not perform content integrity checks. This allows a local attacker with unprivileged code execution on the macOS host user account to modify the VM image, resulting in persistent arbitrary code execution within the VM environment and unauthorized access to host-mounted directories. The vulnerability is confirmed in version 1.1348.0 and related versions up to 1.2278.0. No official patch or remediation has been documented as of the published date.
Potential Impact
A local attacker with unprivileged access to the victim macOS user account can modify the VM root filesystem image to execute arbitrary code persistently within the VM. This also enables the attacker to access directories mounted from the host system, potentially leading to data compromise and further system intrusion. The vulnerability compromises confidentiality, integrity, and availability within the affected VM environment.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict local user access to prevent unauthorized modification of the VM root filesystem image. Monitor for updates from Anthropic regarding patches or mitigations addressing this integrity verification issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- AHA
- Date Reserved
- 2026-05-01T02:06:20.230Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a3b23adeed863c81ed4a4b8
Added to database: 06/24/2026, 00:24:13 UTC
Last enriched: 06/24/2026, 00:39:06 UTC
Last updated: 08/06/2026, 12:41:12 UTC
Views: 116
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