Anthropic Claude Desktop Cowork VM Image Contents Not Validated Before Use

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Summary

CVECVE-2026-7574
StatePUBLISHED
AssignerAHA
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-24 00:16:34 UTC
Updated2026-06-24 00:16:34 UTC
DescriptionAnthropic 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).

Risk And Classification

Primary CVSS: v3.1 8.7 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

Problem Types: CWE-353 | CWE-353 CWE-353 Missing support for integrity check

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.7HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
3.1CNACVSS8.7HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
Low

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Anthropic Claude Desktop Cowork affected 1.1348.0 1.2278.0 semver Not specified

References

ReferenceSourceLinkTags
takeonme.org/gcves/GCVE-1337-2026-0000000000000000000000000000000000000000... [email protected] takeonme.org
cfp.recon.cx/recon-2026/talk/DZUQYU [email protected] cfp.recon.cx
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Todd Manning (en)

CNA: todb of AHA! (en)

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