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CVE-2026-7574

Anthropic Claude Desktop Cowork VM Image Contents Not Validated Before Use

HIGH
8.7
CVSS Score
Published: June 23, 2026 at 11:54 PM UTC
Updated: October 25, 2026 at 11:10 PM UTC
1 product affected across 1 vendorClaude Desktop

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Severity
HIGH8.7
Exploit prediction
EPSS 0.1%
SSVC
PoC

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Claude Desktop· Anthropic
90%
1.1348.0 ≤ v ≤ 1.2278.01.1348.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

Related
Source: cverecord
https://cfp.recon.cx/recon-2026/talk/DZUQYU/
Third Party Advisory
Source: cverecord
https://takeonme.org/gcves/GCVE-1337-2026-00000000000000000000000000000000000000000000000001110111111101011111111110000000000000000000000000000000000000000000000000000001010

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.7HIGHAHA
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
LOW
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-353

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