AI agent vulnerability · Transformers

CVE-2025-3933: Transformers is vulnerable to ReDoS attack through its DonutProcessor class

mediumCVSS 3.1 5.3GHSA-37mw-44qp-f5jm

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.

Published Jul 11, 2025 · Updated Aug 7, 2025

Affected packages

transformers

Ecosystem: PyPI
Affected: <= 4.51.3
Fixed in: 4.52.1
Check: pip show transformers

Advisory details

From the GitHub Advisory Database (CC BY 4.0).

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.

References

How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology

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