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.

Metrics

No CVSS v4.0

No CVSS v3.1

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v2

This CVE is not in the KEV list.

Exploitation poc

Automatable yes

Technical Impact partial

Affected Vendors & Products

Vendors Products
Huggingface
  • Transformers

Configuration 1 [-]

cpe:2.3:a:huggingface:transformers:*:*:*:*:*:*:*:*

No data.

References
Link Providers
https://github.com/huggingface/transformers/commit/0720e206c6ba28887e4d60ef60a6a089f6c1cc76 cve-icon cve-icon cve-icon
https://huntr.com/bounties/c7a69150-54f8-4e81-8094-791e7a2a0f29 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-3263 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-3263 cve-icon
History

Thu, 07 Aug 2025 01:15:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:huggingface:transformers:*:*:*:*:*:*:*:*

Sun, 13 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.00042}

 epss

{'score': 0.00055}

Tue, 08 Jul 2025 00:30:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 threat_severity

Moderate

Mon, 07 Jul 2025 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 07 Jul 2025 10:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Regular Expression Denial of Service (ReDoS) in huggingface/transformers
Weaknesses CWE-1333
References
Metrics cvssV3_0

{'score': 5.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}
cve-icon MITRE

Status: PUBLISHED

Assigner: @huntr_ai

Published: 2025-07-07T09:54:59.670Z

Updated: 2025-07-07T14:51:54.953Z

Reserved: 2025-04-04T12:40:57.226Z

Link: CVE-2025-3263

cve-icon Vulnrichment

Updated: 2025-07-07T14:49:43.884Z

cve-icon NVD

Status : Analyzed

Published: 2025-07-07T10:15:27.350

Modified: 2025-08-07T01:03:17.990

Link: CVE-2025-3263

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-07-07T09:54:59Z

Links: CVE-2025-3263 - Bugzilla