CVE-2025-3262 — HIGH (CVSS 7.5) AI Security Vulnerability

A Regular Expression Denial of Service (ReDoS) vulnerability was discovered in the huggingface/transformers repository, specifically in version 4.49.0. The vulnerability is due to inefficient regular...

Full analysis pending. Showing NVD description excerpt.

Affected Systems

Package	Ecosystem	Vulnerable Range	Patched
transformers	pip	>= 4.49.0, < 4.51.0	`4.51.0`
transformers	pip	—	No patch

Severity & Risk

CVSS 3.1

7.5 / 10

EPSS

0.1%

chance of exploitation in 30 days

KEV Status

Not in KEV

Sophistication

N/A

Recommended Action

Patch available

Update transformers to version 4.51.0

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 was discovered in the huggingface/transformers repository, specifically in version 4.49.0. The vulnerability is due to inefficient regular expression complexity in the `SETTING_RE` variable within the `transformers/commands/chat.py` file. The regex contains repetition groups and non-optimized quantifiers, leading to exponential backtracking when processing 'almost matching' payloads. This can degrade application performance and potentially result in a denial-of-service (DoS) when handling specially crafted input strings. The issue is fixed in version 4.51.0.

Weaknesses (CWE)

CWE-1333 Inefficient Regular Expression Complexity Primary CWE-1333

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Timeline

Published

July 7, 2025

Last Modified

August 4, 2025

First Seen

July 7, 2025