# 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.

- **Severity:** High 8.7 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 23 Jun 2026
- **Updated:** 24 Jun 2026
- **Also known as:** GHSA-g2fx-c284-xq7h

## 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 (Missing Support for Integrity Check)

## 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.

## 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:

- CVE-2026-7574 (github_poc): https://github.com/0xredash/CVE-2026-7574

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-7574 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2026-7574 in the wild and no public exploit code.

Affected product: Anthropic Claude Desktop Cowork. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-7574/ (Markdown: https://insights.sbomify.com/CVE-2026-7574/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-7574
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-7574
- OSV: https://osv.dev/vulnerability/CVE-2026-7574

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-7574/
Summaries are generated and may contain mistakes; the official description above is the record.