CVE-2025-3933: Huggingface Transformers

Medium severity, CVSS 5.3. EPSS: 0.5% chance of exploitation in the next 30 days.

A Regular Expression Denial of Service (ReDoS) vulnerability was discovered in the Hugging Face Transformers library, specifically within the DonutProcessor class's `token2json()` method. This vulnerability affects versions 4.50.3 and earlier, and is fixed in version 4.52.1. The issue arises from the regex pattern `<s_(.*?)>` which can be exploited to cause excessive CPU consumption through crafted input strings due to catastrophic backtracking. This vulnerability can lead to service disruption, resource exhaustion, and potential API service vulnerabilities, impacting document processing tasks using the Donut model.

Affected products

• Huggingface Transformers: before 4.52.1 (fixed in 4.52.1)

Published 2025-07-11. Last modified 2026-06-17.