Type Confusion in isolated-vm - #VU162832
Published: November 9, 2026
Vulnerability identifier: #VU162832
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-843
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a low-privileged attacker to escape an isolated-vm sandbox and hijack control flow in the host process.
The vulnerability exists due to type confusion in ExternalCopy when a transferList getter returns different values during validation and subsequent unchecked use. A low-privileged attacker executing guest code with access to an ivm.Reference can obtain the constructor and supply a stateful getter that triggers host memory corruption.
Affected software
isolated-vm
Remediation
Install security update from vendor's website.
isolated-vm - addressed in versions 6.2.0, 7.0.1