CVE-2026-75104: Hugging Face Transformers Path Traversal via Checkpoint Index

Vulnerability summary

CVE-2026-75104 is a medium (CVSS 6.8) vulnerability in huggingface transformers. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 21.2% of scored vulnerabilities.

Timeline

1. 17-08-2026
   PublishedVulnerability first disclosed.
2. 24-09-2026
   Last modifiedVulnerability information updated.

Description

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.

• CWE-22Improper Limitation of a Pathname to a Restricted DirectoryThe 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.