CVE-2026-7574Public exploit

Persistent VM code execution via unverified rootfs.img

Published Jun 23, 2026 · Updated Jun 24, 2026

VM image integrity failure in Anthropic Claude Desktop Cowork 1.1348.0 through 1.2278.0 allows local users to gain persistent VM code execution. Its startup path checks only that rootfs.img exists and carries the expected version marker, then boots it without verifying the image contents. Unprivileged code execution as the victim macOS user is required to alter the image; subsequent VM boots execute the tampered filesystem and expose host-mounted directories.

CVSS severity8.7
High
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

VM image integrity failure in Anthropic Claude Desktop Cowork 1.1348.0 through 1.2278.0 allows local users to gain persistent VM code execution. Its startup path checks only that rootfs.img exists and carries the expected version marker, then boots it without verifying the image contents. Unprivileged code execution as the victim macOS user is required to alter the image; subsequent VM boots execute the tampered filesystem and expose host-mounted directories.

The record

CVE
CVE-2026-7574
Published
Jun 23, 2026
Updated
Jun 24, 2026
Vendor
Anthropic
Product
Claude Cowork
Classifications
CWE-353
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.1348.0 <=1.2278.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Anthropic · Claude Coworkversion=1.1348.0 <=1.2278.0

Published CVSS scores

8.7Austin Hackers AnonymousCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-353Missing Support for Integrity Check

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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