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CVE-2025-3933

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

Published: Jul 11, 2025Updated: Aug 7, 2025 Sources: CVE List NVD GHSA BDUCWE-1333
NVD MITRE
5.3CVSSMEDIUM
EPSS Score
0.4%
Top 65.4%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available

Description

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 4.50.3 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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:L
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:LAvailability
Low
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Weaknesses

CWE-1333

Affected Products

transformershuggingface
LibraryLibrary
AI / ML / ml-framework
TransformersHugging Face, Inc.
Mixed
AI / ML / ml-framework
transformersPyPIOSS Libraries
huggingface/transformershuggingface
LibraryLibrary
AI / ML / ml-framework
huggingfacecommercialAI / MLaka transformers, huggingface/transformers, smolagents
hugging face, inc.commercialAI / MLaka huggingface, transformers, smolagents
pypipackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

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Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://github.com/huggingface/transformers/commit/ebbe9b12dd75b69f92100d684c47f923ee262a93
github.com
https://huntr.com/bounties/25282953-5827-4384-bb6f-5790d275721b
huntr.com
https://github.com/huggingface/transformers/commit/ebbe9b12dd75b69f92100d684c47f923ee262a93&#13;
github.com
and 3 more references View all →

Timeline

Published
Jul 11, 2025
Last Updated
Aug 7, 2025

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