AI agent vulnerability · Transformers

CVE-2025-3263: Transformers's ReDoS vulnerability in get_configuration_file can lead to catastrophic backtracking

mediumCVSS 3.0 5.3GHSA-q2wp-rjmx-x6x9

A Regular Expression Denial of Service (ReDoS) vulnerability was discovered in the Hugging Face Transformers library, specifically in the getconfigurationfile() function within the transformers.configurationutils module. The affected version is 4.49.0, and the issue is resolved in version 4.51.0.

Published Jul 7, 2025 · Updated Jul 8, 2025

Affected packages

transformers

Ecosystem: PyPI
Affected: < 4.51.0
Fixed in: 4.51.0
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 in the get_configuration_file() function within the transformers.configuration_utils module. The affected version is 4.49.0, and the issue is resolved in version 4.51.0. The vulnerability arises from the use of a regular expression pattern config\.(.*)\.json that can be exploited to cause excessive CPU consumption through crafted input strings, leading to catastrophic backtracking. This can result in model serving disruption, resource exhaustion, and increased latency in applications using the library.

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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