CVE-2025-3262: Transformers vulnerable to ReDoS attack through its SETTING_RE variable
(updated )
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.
References
- github.com/advisories/GHSA-489j-g2vx-39wf
- github.com/huggingface/transformers
- github.com/huggingface/transformers/commit/0720e206c6ba28887e4d60ef60a6a089f6c1cc76
- github.com/huggingface/transformers/commit/126abe3461762e5fc180e7e614391d1b4ab051ca
- huntr.com/bounties/ecf5ccc4-39e7-4fb3-b547-14a41d31a184
- nvd.nist.gov/vuln/detail/CVE-2025-3262
Code Behaviors & Features
Detect and mitigate CVE-2025-3262 with GitLab Dependency Scanning
Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →