CVE-2026-7574

Anthropic Claude Desktop Cowork VM Image Contents Not Validated Before Use

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).

Affected

Anthropic · Claude Desktop Cowork

CVSS v3.1 TAKEONME

8.7 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

EPSS

0.11% chance of exploitation in the next 30 days, 1st percentile

Published

2026-06-23

Updated

2026-06-24

Proof-of-concept exploits (1)

• 0xBlackash/CVE-2026-75741★ · 2026-06-25

References

• CVE Record
• NVD entry