8

CVSS Score

3.0

-

CVSS Score

Basic Information

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CVE-2025-12638

CVE-2025-12638: Duplicate Advisory: Keras keras.utils.get_file API is vulnerable to a path traversal attack

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-hjqc-jx6g-rwp9. This link is maintained to preserve external references.

Original Description

Keras version 3.11.3 is affected by a path traversal vulnerability in the keras.utils.get_file() function when extracting tar archives. The vulnerability arises because the function uses Python's tarfile.extractall() method without the security-critical filter='data' parameter. Although Keras attempts to filter unsafe paths using filter_safe_paths(), this filtering occurs before extraction, and a PATH_MAX symlink resolution bug triggers during extraction. This bug causes symlink resolution to fail due to path length limits, resulting in a security bypass that allows files to be written outside the intended extraction directory. This can lead to arbitrary file writes outside the cache directory, enabling potential system compromise or malicious code execution. The vulnerability affects Keras installations that process tar archives with get_file() and does not affect versions where this extraction method is secured with the appropriate filter parameter.

(GitHub Advisory)

Miggo Vulnerability Database

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CVE-2025-12638

CVE-2025-12638:

8

CVSS Score

3.0

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
Keras	pip	< 3.12.0	3.12.0

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability lies in the way Keras handles the extraction of tar archives, specifically through the keras.utils.get_file API. The root cause is the use of tarfile.extractall() without proper safeguards against path traversal attacks. The provided patch addresses this issue in two key locations.

First, in keras/src/utils/file_utils.py, the extract_archive function, which is called by get_file, was modified. Previously, it used a custom function filter_safe_paths to sanitize archive members, but this was found to be insufficient. The patch replaces this logic with a call to a new, more secure function, extract_open_archive. This new function leverages the filter='data' parameter in tarfile.extractall for Python versions where it's available (3.12+), which provides a robust defense against path traversal.

Second, a similar vulnerability was found and fixed in keras/src/saving/saving_lib.py. The __init__ method of the ArchiveReader class also called extractall() directly without any filtering. This has been replaced with a call to the same secure extract_open_archive function.

Therefore, any runtime profile during the exploitation of this vulnerability would show calls to keras.utils.file_utils.extract_archive or keras.saving.saving_lib.ArchiveReader.__init__ as these are the functions that contained the unsafe extraction logic.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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