GHSA-rcv9-qm8p-9p6j
Hugging Face Transformers library has Regular Expression Denial of Service
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| PyPI | transformers | < 4.53.0 | 4.53.0 |
Details
As written in the advisory (Markdown source, shown as plain text).
A Regular Expression Denial of Service (ReDoS) vulnerability was discovered in the Hugging Face Transformers library, specifically within the `normalize_numbers()` method of the `EnglishNormalizer` class. This vulnerability affects versions up to 4.52.4 and is fixed in version 4.53.0. The issue arises from the method's handling of numeric strings, which can be exploited using crafted input strings containing long sequences of digits, leading to excessive CPU consumption. This vulnerability impacts text-to-speech and number normalization tasks, potentially causing service disruption, resource exhaustion, and API vulnerabilities.
References
External links from the advisory. They lead to third-party sites.
- https://nvd.nist.gov/vuln/detail/CVE-2025-6051
- https://github.com/huggingface/transformers/pull/38844
- https://github.com/huggingface/transformers/commit/54a02160eb030da9be18231c77791f2eb3a52216
- https://github.com/huggingface/transformers/commit/ba8eaba9865618253f997784aa565b96206426f0
- https://github.com/huggingface/transformers
- https://huntr.com/bounties/af929523-7b59-418a-bf55-301830b2ac9d