CVE-2025-5197 — MEDIUM (CVSS 5.3) AI Security Vulnerability

A Regular Expression Denial of Service (ReDoS) vulnerability exists in the Hugging Face Transformers library, specifically in the `convert_tf_weight_name_to_pt_weight_name()` function. This function,...

Full analysis pending. Showing NVD description excerpt.

Affected Systems

Package	Ecosystem	Vulnerable Range	Patched
transformers	pip	< 4.53.0	`4.53.0`
transformers	pip	—	No patch

Severity & Risk

CVSS 3.1

5.3 / 10

EPSS

0.0%

chance of exploitation in 30 days

KEV Status

Not in KEV

Sophistication

N/A

Recommended Action

Patch available

Update transformers to version 4.53.0

Compliance Impact

Compliance analysis pending. Sign in for full compliance mapping when available.

Technical Details

NVD Description

A Regular Expression Denial of Service (ReDoS) vulnerability exists in the Hugging Face Transformers library, specifically in the `convert_tf_weight_name_to_pt_weight_name()` function. This function, responsible for converting TensorFlow weight names to PyTorch format, uses a regex pattern `/[^/]*___([^/]*)/` that can be exploited to cause excessive CPU consumption through crafted input strings due to catastrophic backtracking. The vulnerability affects versions up to 4.51.3 and is fixed in version 4.53.0. This issue can lead to service disruption, resource exhaustion, and potential API service vulnerabilities, impacting model conversion processes between TensorFlow and PyTorch formats.

Weaknesses (CWE)

CWE-1333 Inefficient Regular Expression Complexity Primary CWE-1333

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

Timeline

Published

August 6, 2025

Last Modified

October 21, 2025

First Seen

August 6, 2025