Skip to content
OpenAdvisories
High · 8.7 Public exploit CVE-2026-7574 EUVD-2026-38639GHSA-g2fx-c284-xq7h

Anthropic Claude Desktop Cowork VM Image Contents Not Validated Before Use

Published Jun 23, 2026 · Updated Jun 24, 2026 · Assigned by AHA

Vendor: Anthropic Product: Claude Desktop Cowork

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).

Affected products

VendorProductAffectedFixed
Anthropic Claude Desktop Cowork 1.1348.0 – ≤ 1.2278.0 —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 1 repository

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

References