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CVE-2024-12720

Regular Expression Denial of Service (ReDoS) in huggingface/transformers

Published: Mar 20, 2025Updated: Aug 1, 2025 Sources: CVE List NVD GHSACWE-1333
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.7%
Top 52.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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).

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-1333

Affected Products

huggingface/transformershuggingface
LibraryLibrary
AI / ML / ml-framework
transformershuggingface
LibraryLibrary
AI / ML / ml-framework
transformersPyPIOSS Libraries
huggingfacecommercialAI / MLaka transformers, huggingface/transformers, smolagents
pypipackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://huntr.com/bounties/4bed1214-7835-4252-a853-22bbad891f98
huntr.com
https://github.com/huggingface/transformers/commit/deac971c469bcbb182c2e52da0b82fb3bf54cccf
github.com
https://nvd.nist.gov/vuln/detail/CVE-2024-12720
nvd.nist.gov
and 1 more references View all →

Timeline

Published
Mar 20, 2025
Last Updated
Aug 1, 2025

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