Hugging Face diffusers up to 0.39.0 Model Loading _get_checkpoint_shard_files weight_map path traversal

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Hugging Face diffusers up to 0.39.0. This affects the function _get_checkpoint_shard_files of the component Model Loading. The manipulation of the argument weight_map leads to path traversal. This vulnerability is referenced as CVE-2026-65920. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in Hugging Face diffusers up to 0.39.0 and classified as problematic. This issue affects the function _get_checkpoint_shard_files of the component Model Loading. The manipulation of the argument weight_map with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality. The summary by CVE is:

Diffusers through 0.39.0, fixed in commit cee298c, contains a path traversal vulnerability in the _get_checkpoint_shard_files function that allows attackers to read arbitrary files by supplying malicious weight_map values in model index JSON. Attackers can use ../ sequences or absolute paths in weight_map entries to escape the model directory and read safetensors files outside the intended location during model loading.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-65920 since 07/23/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

Applying the patch cee298c1f37c439a9a408396b8283a921238a1c6 is able to eliminate this problem.

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Productinfo

Vendor

• Hugging Face

Name

• diffusers

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16
• 0.17
• 0.18
• 0.19
• 0.20
• 0.21
• 0.22
• 0.23
• 0.24
• 0.25
• 0.26
• 0.27
• 0.28
• 0.29
• 0.30
• 0.31
• 0.32
• 0.33
• 0.34
• 0.35
• 0.36
• 0.37
• 0.38
• 0.39.0

CPE 2.3info

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CPE 2.2info

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