AI Threat Alert
A vulnerability in the `preprocess_string()` function of the `transformers.testing_utils` module in huggingface/transformers version v4.48.3 allows for a Regular Expression Denial of Service (ReDoS)...
Full analysis pending. Showing NVD description excerpt.
Affected Systems
| Package | Ecosystem | Vulnerable Range | Patched |
|---|---|---|---|
| transformers | pip | < 4.50.0 | 4.50.0 |
| transformers | pip | — | No patch |
Severity & Risk
Recommended Action
Patch available
Update transformers to version 4.50.0
Compliance Impact
Compliance analysis pending. Sign in for full compliance mapping when available.
Technical Details
NVD Description
A vulnerability in the `preprocess_string()` function of the `transformers.testing_utils` module in huggingface/transformers version v4.48.3 allows for a Regular Expression Denial of Service (ReDoS) attack. The regular expression used to process code blocks in docstrings contains nested quantifiers, leading to exponential backtracking when processing input with a large number of newline characters. An attacker can exploit this by providing a specially crafted payload, causing high CPU usage and potential application downtime, effectively resulting in a Denial of Service (DoS) scenario.
Weaknesses (CWE)
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H References
- github.com/advisories/GHSA-qq3j-4f4f-9583
- github.com/huggingface/transformers/commit/8cb522b4190bd556ce51be04942720650b1a3e57
- github.com/huggingface/transformers/pull/36648
- github.com/pypa/advisory-database/tree/main/vulns/transformers/PYSEC-2025-40.yaml
- huntr.com/bounties/97b780f3-ffca-424f-ad5d-0e1c57a5bde4
- nvd.nist.gov/vuln/detail/CVE-2025-2099
- github.com/huggingface/transformers/commit/8cb522b4190bd556ce51be04942720650b1a3e57 Patch
- huntr.com/bounties/97b780f3-ffca-424f-ad5d-0e1c57a5bde4 Exploit 3rd Party