MEDIUM 5.3

GHSA-37mw-44qp-f5jm

Transformers is vulnerable to ReDoS attack through its DonutProcessor class

Details

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.

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Affected packages

PyPI / transformers

Introduced in: 0 Fixed in: 4.52.1

Fix pip install --upgrade 'transformers>=4.52.1'

References

https://nvd.nist.gov/vuln/detail/CVE-2025-3933 [ADVISORY]
https://github.com/huggingface/transformers/pull/37788 [WEB]
https://github.com/huggingface/transformers/commit/ebbe9b12dd75b69f92100d684c47f923ee262a93 [WEB]
https://github.com/huggingface/transformers [PACKAGE]
https://huntr.com/bounties/25282953-5827-4384-bb6f-5790d275721b [WEB]