CVE-2024-12720

Description

A Regular Expression Denial of Service (ReDoS) vulnerability was identified in the huggingface/transformers library, specifically in the file tokenization_nougat_fast.py. The vulnerability occurs in the post_process_single() function, where a regular expression processes specially crafted input. The issue stems from the regex exhibiting exponential time complexity under certain conditions, leading to excessive backtracking. This can result in significantly high CPU usage and potential application downtime, effectively creating a Denial of Service (DoS) scenario. The affected version is v4.46.3 (latest).

Reserved 2024-12-17 | Published 2025-03-20 | Updated 2025-03-20 | Assigner @huntr_ai

Problem types

CWE-1333 Inefficient Regular Expression Complexity

Product status

Any version before 4.48.0
affected

References

huntr.com/bounties/4bed1214-7835-4252-a853-22bbad891f98

github.com/...ommit/deac971c469bcbb182c2e52da0b82fb3bf54cccf

cve.org (CVE-2024-12720)

nvd.nist.gov (CVE-2024-12720)

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