# CVE-2025-3263: Regular Expression Denial of Service (ReDoS) in huggingface/transformers

> CVE-2025-3263: Regular Expression Denial of Service (ReDoS) in huggingface/transformers. CVSS 5.3 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2025-3263
Last updated: 2026-06-17T09:19:32Z

- Published: 2025-07-07 09:54 UTC · Updated: 2026-06-17 09:19 UTC · Assigner: @huntr\_ai
- CVSS: 5.3 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- EPSS: 0.50%, 42th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-1333

## Description

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.

## Affected vendors and products

- huggingface: huggingface/transformers

## Tracked companies

- [Hugging Face](https://rewindex.com/company/hugging-face.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-3263)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-3263)
- [https://github.com/huggingface/transformers/commit/0720e206c6ba28887e4d60ef60a6a089f6c1cc76](https://github.com/huggingface/transformers/commit/0720e206c6ba28887e4d60ef60a6a089f6c1cc76)
- [https://huntr.com/bounties/c7a69150-54f8-4e81-8094-791e7a2a0f29](https://huntr.com/bounties/c7a69150-54f8-4e81-8094-791e7a2a0f29)

---

_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


---
Canonical: https://rewindex.com/cve/CVE-2025-3263 · Markdown: https://rewindex.com/cve/CVE-2025-3263.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-3263 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:46:27.754Z