Unsafe reflection in Diffusers - #VU164387
Published: November 10, 2026
Vulnerability identifier: #VU164387
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-470
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code with the victim's privileges when loading a malicious Diffusers repository.
The vulnerability exists due to externally controlled module selection in Diffusers model loading when component library names reach importlib.import_module() or requirements keys reach importlib.util.find_spec() without validation. A remote attacker can entice a victim to load a crafted local repository using from_pretrained(), with the repository importable from a sys.path root, to execute bundled Python code even with trust_remote_code=False and DIFFUSERS_DISABLE_REMOTE_CODE=1.
Affected software
Diffusers
Remediation
Install security update from vendor's website.
Diffusers - update to 0.42.1