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TI-2025-02859 Aliases CVE-2025-3263GHSA-q2wp-rjmx-x6x9

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

Priority MEDIUM 63CWE-1333Published · Updated

Key facts

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

Attack profile from CVSS 3.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-1333.

Summary

A Regular Expression Denial of Service (ReDoS) vulnerability was discovered in the Hugging Face Transformers library, specifically in the `get_configuration_file()` function within the `transformers.configuration_utils` module. The affected version is 4.49.0, and the issue is resolved in version 4.51.0. The vulnerability arises from the use of a regular expression pattern `config\.(.*)\.json` that can be exploited to cause excessive CPU consumption through crafted input strings, leading to catastrophic backtracking. This can result in model serving disruption, resource exhaustion, and increased latency in applications using the library.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00496 42nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed huggingface/transformers (huggingface): 4.51.0transformers (PyPI): 4.51.0

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

VendorProductAffected versionsFixed inStatusSource
huggingfacehuggingface/transformersbefore 4.51.04.51.0Patch availableCNA
—transformers (PyPI)before 4.51.04.51.0Patch availableGHSA-q2wp-rjmx-x6x9
  • huggingface/transformers Vendorhuggingface Affected before 4.51.0 Fixed in 4.51.0 Patch available CNA
  • transformers (PyPI) Vendor— Affected before 4.51.0 Fixed in 4.51.0 Patch available GHSA-q2wp-rjmx-x6x9

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:huggingface:transformers:*:*:*:*:*:*:*:*4.49.0 to before 4.51.0Vulnerablehuggingface
  • cpe:2.3:a:huggingface:transformers:*:*:*:*:*:*:*:* Versions 4.49.0 to before 4.51.0 Vulnerable ·huggingface

Remediation

  • Fix · CNA huggingface/transformers (huggingface) Fixed in 4.51.0
  • Fix · GHSA-q2wp-rjmx-x6x9 transformers (PyPI) Fixed in 4.51.0 Advisory →

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    huggingface/transformers 4.51.0

    3 records Highest priority Priority HIGH 1 HIGH, 2 MEDIUM

    Other records, highest priority first

    • TI-2025-02858 Regular Expression Denial of Service (ReDoS) in huggingface/transformersPriority HIGH 72
    • TI-2025-02860 Regular Expression Denial of Service (ReDoS) in huggingface/transformersPriority MEDIUM 63
    Show all 3 records →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Not affected: 5 products
  • OpenShift Lightspeed
  • Red Hat AI Inference Server
  • Red Hat Ansible Automation Platform 2
  • Red Hat Enterprise Linux AI (RHEL AI)
  • Red Hat OpenShift AI (RHOAI)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-3263
  2. 2026-10-03 Alias added: GHSA-q2wp-rjmx-x6x9

References

Exploit 1

Patch 1

Advisory 1

Other 2

  • 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