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TI-2025-01019 Aliases CVE-2025-1194GHSA-fpwr-67px-3qhx

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

Priority MEDIUM 62CWE-1333Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
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_gpt_neox_japanese.py` of the GPT-NeoX-Japanese model. The vulnerability occurs in the SubWordJapaneseTokenizer class, where regular expressions process specially crafted inputs. The issue stems from a regex exhibiting exponential complexity under certain conditions, leading to excessive backtracking. This can result in high CPU usage and potential application downtime, effectively creating a Denial of Service (DoS) scenario. The affected version is v4.48.1 (latest).

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00492 42nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed huggingface/transformers (huggingface): 4.50.0transformers (PyPI): 4.50.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
huggingfacehuggingface/transformersbefore 4.50.04.50.0Patch availableCNA
—transformers (PyPI)before 4.50.04.50.0Patch availableGHSA-fpwr-67px-3qhx
  • huggingface/transformers Vendorhuggingface Affected before 4.50.0 Fixed in 4.50.0 Patch available CNA
  • transformers (PyPI) Vendor— Affected before 4.50.0 Fixed in 4.50.0 Patch available GHSA-fpwr-67px-3qhx

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:huggingface:transformers:*:*:*:*:*:*:*:*before 4.50.0Vulnerablehuggingface
  • cpe:2.3:a:huggingface:transformers:*:*:*:*:*:*:*:* Versions before 4.50.0 Vulnerable ·huggingface

Remediation

  • Fix · CNA huggingface/transformers (huggingface) Fixed in 4.50.0
  • Fix · GHSA-fpwr-67px-3qhx transformers (PyPI) Fixed in 4.50.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-1194
  2. 2026-10-03 Alias added: GHSA-fpwr-67px-3qhx

References

Exploit 1

Patch 1

Advisory 1

Other 1

  • 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-2024-11793 Regular Expression Denial of Service (ReDoS) in huggingface/transformers CVSS 3.1HIGH 7.5
See all 29 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences