High severity · published Jun 23, 2026
CVE-2026-7574
Anthropic Claude Desktop Cowork VM Image Contents Not Validated Before Use
8.7
CVSS
0.1%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
Low
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 2% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CD
Claude Desktop Cowork · Anthropic
1.1348.0 through 1.2278.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-7574
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-7574
cfp.recon.cx
https://cfp.recon.cx/recon-2026/talk/DZUQYU/
takeonme.org
https://takeonme.org/gcves/GCVE-1337-2026-00000000000000000000000000000000000000000000000001110111111101011111111110000000000000000000000000000000000000000000000000000001010