Vulnerability 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 Score
HIGH
Related Weaknesses (CWE)
References
- https://cfp.recon.cx/recon-2026/talk/DZUQYU/
- https://takeonme.org/gcves/GCVE-1337-2026-00000000000000000000000000000000000000
FAQ
What is CVE-2026-7574?
CVE-2026-7574 is a vulnerability with a CVSS score of 8.7 (HIGH). 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...
How severe is CVE-2026-7574?
CVE-2026-7574 has been rated HIGH with a CVSS base score of 8.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-7574?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.