Transformers vulnerable to ReDoS attack through its SETTING_RE variable
A Regular Expression Denial of Service (ReDoS) vulnerability was discovered in the huggingface/transformers repository, specifically in version 4.49.0. The vulnerability is due to inefficient regular expression complexity in the `SETTING_RE` variable within the `transformers/commands/chat.py` file. The regex contains repetition groups and non-optimized quantifiers, leading to exponential backtracking when processing 'almost matching' payloads. This can degrade application performance and potentially result in a denial-of-service (DoS) when handling specially crafted input strings. The issue is fixed in version 4.51.0.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2025-3262US | high7.5 | — | ||
A Regular Expression Denial of Service (ReDoS) vulnerability was discovered in the huggingface/transformers repository, specifically in version 4.49.0. The vulnerability is due to… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/huggingface/transformersPACKAGE
- https://github.com/huggingface/transformers/commit/0720e206c6ba28887e4d60ef60a6a089f6c1cc76WEB
- https://github.com/huggingface/transformers/commit/126abe3461762e5fc180e7e614391d1b4ab051caWEB
- https://huntr.com/bounties/ecf5ccc4-39e7-4fb3-b547-14a41d31a184WEB
- https://nvd.nist.gov/vuln/detail/CVE-2025-3262ADVISORY
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