CVE Tools
Sign in

CVE-2025-3262

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

Published: Jul 7, 2025Updated: Aug 2, 2025 Sources: CVE List NVD GHSA BDUCWE-1333
7.5HIGH
NVD MITRE
EPSS Score
0.4%
Top 64.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

Description

A Regular Expression Denial of Service (ReDoS) vulnerability was discovered in the huggingface/transformers repository, specifically in version 4.49.0. The vulnerability is due to inefficient regular expression complexity in the `SETTING_RE` variable within the `transformers/commands/chat.py` file. The regex contains repetition groups and non-optimized quantifiers, leading to exponential backtracking when processing 'almost matching' payloads. This can degrade application performance and potentially result in a denial-of-service (DoS) when handling specially crafted input strings. The issue is fixed in version 4.51.0.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
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:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-1333

Affected Products

huggingface
commercialaka smolagents, transformers, huggingface/transformers
huggingface/transformersLibraryLibrary
AI / ML / ml-framework
transformersLibraryLibrary
AI / ML / ml-framework
PyPI
package-ecosystem
transformers
OSS Libraries
Hugging Face, Inc.
commercialaka huggingface, smolagents, transformers
TransformersMixed
AI / ML / ml-framework

Exploitability

Official Patch Available
Is your org exposed to CVE-2025-3262?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://huntr.com/bounties/ecf5ccc4-39e7-4fb3-b547-14a41d31a184
huntr.com
https://github.com/huggingface/transformers/commit/0720e206c6ba28887e4d60ef60a6a089f6c1cc76
github.com
https://nvd.nist.gov/vuln/detail/CVE-2025-3262
nvd.nist.gov
and 3 more references View all →

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2025-3262 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows