CVE-2025-3262

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.

How to fix CVE-2025-3262

To remediate CVE-2025-3262, upgrade the affected package to a fixed version below.

• —upgrade to 4.51.0 or later

Is CVE-2025-3262 being exploited?

Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.

Affected packages (1)

• >= 4.49.0, < 4.51.0

CVSS scores

References (5)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2025-3262
• PATCHgithub.com/huggingface/transformers
• WEBgithub.com/huggingface/transformers/commit/0720e206c6ba28887e4d60ef60a6a089f6c1cc76
• WEBgithub.com/huggingface/transformers/commit/126abe3461762e5fc180e7e614391d1b4ab051ca