gcdRadar
archive/Patch now/AIR-2025-0284
closedclosed 19 May 2025Patch now2 Disclosed vulnerabilityAI

CVE-2025-2099: Hugging Face Transformers Regular Expression Denial of Service

Transformers

A regular expression denial of service vulnerability exists in the preprocessing utility of Hugging Face Transformers before version 4.50.0. Specially crafted inputs can trigger catastrophic backtracking, degrading system availability.

disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why

CVSS
5.3
EPSS
0.01 · top 51% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
first report
19 May 2025
last update
19 May 2025
CVE ids
CVE-2025-2099other records

Timeline · 1

  1. 19 May 2025CVE-2025-2099: Hugging Face Transformers Regular Expression Denial of Service

Sources · 1

Advisories and databases

  1. 2025-05-19
    CVE-2025-2099: Hugging Face Transformers Regular Expression Denial of Service
    GitHub Advisory Database · github.com/advisories/GHSA-qq3j-4f4f-9583

Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.

Classification

lane
Patch now
AI role
Attack on AI
categories
Infrastructure vulnerability
severity
2 · Disclosed vulnerability
fix status
Fix status unknown
targets
Framework / tooling
owasp llm top 10
LLM03:2025 Supply Chain
mitre atlas
no technique for these categories
tags
redoshuggingface
dates
happened 19 May 2025 · first reported 19 May 2025
origin
GitHub Advisory Database
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
record
confidence 0.95 · created 2026-10-18 07:00Z · updated 2026-10-18 07:00Z

Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned

Copy a brief

This record as a short Markdown brief, for a ticket, a chat or a coding agent.

the brief as text
# CVE-2025-2099: Hugging Face Transformers Regular Expression Denial of Service

https://gcdradar.vercel.app/incidents/cve-2025-2099-hugging-face-transformers-regular-expression-d · AIR-2025-0284 · closed 2025-05-19

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2025-05-19
- AI role: Attack on AI
- Products: Transformers
- CVE ids: CVE-2025-2099
- CVSS: 5.3

## Summary

A regular expression denial of service vulnerability exists in the preprocessing utility of Hugging Face Transformers before version 4.50.0. Specially crafted inputs can trigger catastrophic backtracking, degrading system availability.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2025-05-19: CVE-2025-2099: Hugging Face Transformers Regular Expression Denial of Service (https://github.com/advisories/GHSA-qq3j-4f4f-9583)

## Sources

- 2025-05-19 GitHub Advisory Database: CVE-2025-2099: Hugging Face Transformers Regular Expression Denial of Service https://github.com/advisories/GHSA-qq3j-4f4f-9583

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.

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