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CVE-2024-12720

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).

Published

2025-03-20T10:15:29.507

Last Modified

2025-08-01T21:11:26.963

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

Weaknesses

Type: Secondary
CWE-1333

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	huggingface	transformers	< 4.48.0	Yes

References

https://github.com/huggingface/transformers/commit/deac971c469bcbb182c2e52da0b82fb3bf54cccf Patch ([email protected])
https://huntr.com/bounties/4bed1214-7835-4252-a853-22bbad891f98 Vendor Advisory ([email protected])
https://huntr.com/bounties/4bed1214-7835-4252-a853-22bbad891f98 Vendor Advisory (134c704f-9b21-4f2e-91b3-4a467353bcc0)