CVE-2026-68771
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Summary
ComfyUI v0.23.0 contains an unsafe deserialization vulnerability in the LoadTrainingDataset node that allows unauthenticated remote attackers to execute arbitrary Python code by uploading a crafted pickle file and triggering its deserialization. Attackers can upload a malicious shard_*.pkl file via the unauthenticated POST /upload/image endpoint and then queue a workflow graph via POST /prompt referencing the uploaded file, causing torch.load to deserialize the attacker-controlled pickle payload using reduce and execute arbitrary commands as the ComfyUI process user.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Comfy-Org | ComfyUI | 0 <= 0.23.0 | affected |
Weaknesses
- CWE-502: Deserialization of Untrusted Data
References
- https://github.com/Comfy-Org/ComfyUI/pull/14543
- https://github.com/Comfy-Org/ComfyUI
- https://github.com/Comfy-Org/ComfyUI/commit/94ee49b1612824366a8631ea069b2a1fa5c73720
- https://www.vulncheck.com/advisories/comfyui-unauthenticated-rce-via-loadtrainingdataset-pickle-deserialization
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