TI-2024-11793 Aliases CVE-2024-12720 GHSA-6rvg-6v2m-4j46

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

HIGH 72CWE-1333Published 2025-03-20 · Updated 2025-03-20

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-1333.

Summary

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).

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00747 55th percentileScored 2026-11-08

Fix Fixed huggingface/transformers (huggingface): 4.48.0transformers (PyPI): 4.48.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
huggingface	huggingface/transformers	before 4.48.0	4.48.0	Patch available	CNA
—	transformers (PyPI)	before 4.48.0	4.48.0	Patch available	GHSA-6rvg-6v2m-4j46

huggingface/transformers Vendorhuggingface Affected before 4.48.0 Fixed in 4.48.0 Patch available CNA
transformers (PyPI) Vendor— Affected before 4.48.0 Fixed in 4.48.0 Patch available GHSA-6rvg-6v2m-4j46

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:huggingface:transformers::::::::	before 4.48.0	Vulnerable	huggingface

cpe:2.3:a:huggingface:transformers:*:*:*:*:*:*:*:* Versions before 4.48.0 Vulnerable ·huggingface

Remediation

Fix · CNA huggingface/transformers (huggingface) Fixed in 4.48.0
Fix · GHSA-6rvg-6v2m-4j46 transformers (PyPI) Fixed in 4.48.0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2024-12720
2026-10-03 Alias added: GHSA-6rvg-6v2m-4j46

References

Patch 1

https://github.com/huggingface/transformers/commit/deac971c469bcbb182c2e52da0b82fb3bf54cccf

Advisory 2

Other 1

https://github.com/huggingface/transformers

TI-2026-04577 Policy Bypass in LightGlue Nested Config Resolution in huggingface/transformers CVSS 3.1CRITICAL 9.6
TI-2025-06294 Regular Expression Denial of Service (ReDoS) in huggingface/transformers CVSS 3.1HIGH 7.5
TI-2025-06027 Regular Expression Denial of Service (ReDoS) in huggingface/transformers CVSS 3.1HIGH 7.5
TI-2025-02858 Regular Expression Denial of Service (ReDoS) in huggingface/transformers CVSS 3.1HIGH 7.5
TI-2025-01837 Regular Expression Denial of Service (ReDoS) in huggingface/transformers CVSS 3.1HIGH 7.5
TI-2026-01514 Arbitrary Code Execution via Unsafe torch.load() in Trainer Checkpoint Loading in huggingface/transformers CVSS 3.1HIGH 7.8

See all 29 →

Sources

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