Hugging Face Transformers fails to validate shard filenames in checkpoint index files, allowing attackers to read arbitrary files outside the model directory. Attackers can supply malicious index files with parent-directory references or absolute paths that are joined without validation, enabling file disclosure and filesystem reconnaissance.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
Passive
Minimal interaction
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 5
https://github.com/huggingface/transformers
disclosure@vulncheck.com
https://github.com/huggingface/transformers/blob/main/src/transformers/utils/hu…
disclosure@vulncheck.com
https://github.com/huggingface/transformers/issues/47176
disclosure@vulncheck.com
https://github.com/huggingface/transformers/issues/47177
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/hugging-face-transformers-path-traversal-v…
disclosure@vulncheck.com