Deserialization in Vllm-project Vllm
CVE-2025-47277
vLLM, an inference and serving engine for large language models (LLMs), has an issue in versions 0.6.5 through 0.8.4 that ONLY impacts environments using the `PyNcclPipe` KV cache transfer integration with the V0 engine. No other configura…
Vulnerability class: Insecure Deserialization
EPSS: 0.009 (75.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Vllm-project Vllm — versions >= 0.6.5, < 0.8.5
Weakness classification (CWE)
Public proof-of-concept exploits
References
- https://github.com/vllm-project/vllm/security/advisories/GHSA-hjq4-87xh-g4fv (x_refsource_CONFIRM)
- https://github.com/vllm-project/vllm/pull/15988 (x_refsource_MISC)
- https://github.com/vllm-project/vllm/commit/0d6e187e88874c39cda7409cf673f9e6546893e7 (x_refsource_MISC)
- https://docs.vllm.ai/en/latest/deployment/security.html (x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-47277?
- CVE-2025-47277 is a critical-severity vulnerability in Vllm-project Vllm, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2025-05-20.
- How severe is CVE-2025-47277?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2025-47277 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.