What is the CVSS score of CVE-2025-3263?

CVE-2025-3263 has a CVSS 3.0 base score of 5.3 (Medium). CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L. EPSS exploitation probability: 0.0%.

Which versions of Transformers are affected by CVE-2025-3263?

CVE-2025-3263 presents moderate security risk rated CVSS 5.3. Exploitation could compromise the security of affected deployments. Proof-of-concept code is publicly available.. A patch is available.

Is there a public PoC exploit available for CVE-2025-3263?

Yes, a public proof-of-concept exploit is available for CVE-2025-3263. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2025-3263?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Vendor patch is available.

Transformers CVE-2025-3263

EUVD-2025-20215 MEDIUM

Inefficient Regular Expression Complexity (ReDoS) (CWE-1333)

2025-07-07 security@huntr.dev

GHSA-q2wp-rjmx-x6x9

Denial Of Service Transformers Hugging Face AI / ML Red Hat

5.3

CVSS 3.0 · NVD

Severity by source

NVD PRIMARY

5.3 MEDIUM

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Red Hat

5.3 MEDIUM

qualitative

Primary rating from NVD.

CVSS VectorNVD

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Lifecycle Timeline

EUVD ID Assigned

Mar 16, 2026 - 03:37 euvd

EUVD-2025-20215

Analysis Generated

Mar 16, 2026 - 03:37 vuln.today

Patch released

Mar 16, 2026 - 03:37 nvd

Patch available

PoC Detected

Aug 07, 2025 - 01:03 vuln.today

Public exploit code

CVE Published

Jul 07, 2025 - 10:15 nvd

MEDIUM 5.3

Blast Radius

ecosystem impact

† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth

8 pypi packages depend on transformers (8 direct, 0 indirect)

Ecosystem-wide dependent count for version 4.51.0.

DescriptionCVE.org

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.

Analysis

Technical ContextAI

A denial of service vulnerability allows an attacker to disrupt the normal functioning of a system, making it unavailable to legitimate users. This vulnerability is classified as Inefficient Regular Expression Complexity (ReDoS) (CWE-1333).

RemediationAI

A vendor patch is available — apply it immediately. Implement rate limiting and input validation. Use timeout mechanisms for resource-intensive operations. Deploy DDoS protection where applicable.