CVE-2026-7574: high-severity vulnerability in Anthropic Claude Desktop Cowork
Anthropic Claude Desktop Cowork VM Image Contents Not Validated Before Use
Published · Updated
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41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 8.7epss 0.1%
from disclosure to weapon2 days
Published on NVDJun 23
1st PoC+2d
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:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
Affected products
Anthropic · Claude Desktop Coworkpublic PoCs found — 1
githubgithub.com/0xBlackash/CVE-2026-7574★ 1⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.