TransformersGHSA-fpwr-67px-3qhx
Transformers Regular Expression Denial of Service (ReDoS) vulnerability
Medium4.3CVE-2025-1194 · Published Apr 29, 2025 · updated Aug 13, 2026
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| transformers PyPI | < 4.50.0 | 4.50.0 |
Details and references
A Regular Expression Denial of Service (ReDoS) vulnerability was identified in the huggingface/transformers library, specifically in the file `tokenization_gpt_neox_japanese.py` of the GPT-NeoX-Japanese model. The vulnerability occurs in the SubWordJapaneseTokenizer class, where regular expressions process specially crafted inputs. The issue stems from a regex exhibiting exponential complexity under certain conditions, leading to excessive backtracking. This can result in high CPU usage and potential application downtime, effectively creating a Denial of Service (DoS) scenario. The affected version is v4.48.1 (latest).
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
- Severity from
- GitHub (reviewed advisory)
- Weakness
- CWE-1333
- Also known as
- CVE-2025-1194, PYSEC-2026-1984
More Transformers advisories
All Transformers| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| May 192025 | Hugging Face Transformers Regular Expression Denial of Service CVE-2025-2099Medium5.3fixed in 4.50.0 | Medium5.3 | 4.50.0 |
| Mar 202025 | Transformers Regular Expression Denial of Service (ReDoS) vulnerability CVE-2024-12720Medium5.3fixed in 4.48.0 | Medium5.3 | 4.48.0 |
| 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 72025 | Transformers's ReDoS vulnerability in get_configuration_file can lead to catastrophic backtracking CVE-2025-3263Medium5.3fixed in 4.51.0 | Medium5.3 | 4.51.0 |