CVE-2026-7574 Anthropic Claude Desktop Cowork VM Image Contents Not Validated Before Use
Local attackers can modify VM images to achieve persistent code execution and access host directories due to missing integrity checks.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-7574?
CVE-2026-7574 is a high-severity missing authorization vulnerability in Anthropic Claude Desktop Cowork, published on 23 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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).
Weakness: CWE-353
Which versions are affected by CVE-2026-7574?
How do I fix CVE-2026-7574?
No fix has been published for CVE-2026-7574 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-7574 being exploited?
There is no known exploitation of CVE-2026-7574 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-g2fx-c284-xq7h.