CVE-2026-100840: MONAI through 1.6.0 Remote Code Execution via bundle configuration
MONAI through 1.6.0 contains a remote code execution vulnerability in the bundle configuration engine that resolves target values to arbitrary importable callables without an allow list and passes $ expressions to Python eval(). Attackers can publish a malicious bundle with crafted configuration containing arbitrary code that executes when a victim loads the bundle using monai.bundle.load() or monai.bundle.run().
Affected Software
Event History
Frequently Asked Questions
Who is exposed to this issue?
Users of MONAI through 1.6.0 are exposed when they load or run a bundle obtained from an untrusted source using monai.bundle.load() or monai.bundle.run(). The vulnerable behavior is in bundle configuration processing.
What does an attacker need to do to exploit it?
An attacker needs to publish or otherwise provide a malicious MONAI bundle containing crafted configuration. Exploitation occurs when a victim loads or runs that bundle.
Does exploitation require user interaction or prior access to the target system?
The attacker does not need prior privileges on the target system. A victim must load or run the malicious bundle, making exploitation dependent on that action.
What can be done if patching is not immediately possible?
Do not load or run bundles from untrusted sources. Restrict bundle use to configurations that have been reviewed and obtained from trusted publishers.