TransformersGHSA-q2wp-rjmx-x6x9
Transformers's ReDoS vulnerability in get_configuration_file can lead to catastrophic backtracking
Medium5.3CVE-2025-3263 · Published Jul 7, 2025 · updated Jul 7, 2026
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| transformers PyPI | < 4.51.0 | 4.51.0 |
Details and references
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.
- CVSS 3.0
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Severity from
- GitHub (reviewed advisory)
- Weakness
- CWE-1333
- Also known as
- CVE-2025-3263, PYSEC-2026-1987
More Transformers advisories
All Transformers| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Jul 72025 | Transformers vulnerable to ReDoS attack through its SETTING_RE variable CVE-2025-3262Medium5.3fixed in 4.51.0 | Medium5.3 | 4.51.0 |
| Jul 72025 | Transformers vulnerable to ReDoS attack through its get_imports() function CVE-2025-3264Medium5.3fixed in 4.51.0 | Medium5.3 | 4.51.0 |
| Jul 72025 | Transformers's Improper Input Validation vulnerability can be exploited through username injection CVE-2025-3777Low3.5fixed in 4.52.1 | Low3.5 | 4.52.1 |
| Jul 112025 | Transformers is vulnerable to ReDoS attack through its DonutProcessor class CVE-2025-3933Medium5.3fixed in 4.52.1 | Medium5.3 | 4.52.1 |
| Aug 62025 | Hugging Face Transformers Regular Expression Denial of Service (ReDoS) vulnerability CVE-2025-5197Medium5.3fixed in 4.53.0 | Medium5.3 | 4.53.0 |
| May 192025 | Hugging Face Transformers Regular Expression Denial of Service CVE-2025-2099Medium5.3fixed in 4.50.0 | Medium5.3 | 4.50.0 |