CVE-2025-3933: Regular Expression Denial of Service (ReDoS) in huggingface/transformers
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.
Other sources
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.
— IBM
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 4.51.3 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.
— GitHub
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
pip/transformersto a version that resolves this vulnerability.Fixed in 4.52.1 - Upgrade
Upgrade
huggingface/transformersto a version that resolves this vulnerability.Fixed in 4.52.1
Event History
Frequently Asked Questions
What is the severity of CVE-2025-3933?
CVE-2025-3933 has a moderate severity due to its potential for causing denial of service through regular expressions.
How do I fix CVE-2025-3933?
To fix CVE-2025-3933, upgrade the Hugging Face Transformers library to version 4.52.1 or later.
Which versions are affected by CVE-2025-3933?
CVE-2025-3933 affects Hugging Face Transformers versions up to and including 4.50.3.
What is the nature of the attack for CVE-2025-3933?
The attack for CVE-2025-3933 is a Regular Expression Denial of Service (ReDoS) that can be triggered through the `token2json()` method.
What software is impacted by CVE-2025-3933?
CVE-2025-3933 impacts the Hugging Face Transformers library specifically.