CVEvulnerability
CVE-2025-46570
2.6 LOW
Official page ↗
- Status
- Analyzed
- Published
- 2025-05-29
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 2.6 LOW — CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N
- Weaknesses
- CWE-203, CWE-208
Description
vLLM is an inference and serving engine for large language models (LLMs). Prior to version 0.9.0, when a new prompt is processed, if the PageAttention mechanism finds a matching prefix chunk, the prefill process speeds up, which is reflected in the TTFT (Time to First Token). These timing differences caused by matching chunks are significant enough to be recognized and exploited. This issue has been patched in version 0.9.0.
Affected configurations
• vllm vllm (< 0.9.0)
Related
References
- https://github.com/vllm-project/vllm/commit/77073c77bc2006eb80ea6d5128f076f5e6c6f54f Patch
- https://github.com/vllm-project/vllm/pull/17045 Issue Tracking, Vendor Advisory
- https://github.com/vllm-project/vllm/security/advisories/GHSA-4qjh-9fv9-r85r Vendor Advisory