{"cve":{"cve_id":"CVE-2025-47277","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.00926,"epss_percentile":0.55816,"epss_as_of":"2026-06-23","description":"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 configurations are affected. vLLM supports the use of the `PyNcclPipe` class to establish a peer-to-peer communication domain for data transmission between distributed nodes. The GPU-side KV-Cache transmission is implemented through the `PyNcclCommunicator` class, while CPU-side control message passing is handled via the `send_obj` and `recv_obj` methods on the CPU side.​ The intention was that this interface should only be exposed to a private network using the IP address specified by the `--kv-ip` CLI parameter. The vLLM documentation covers how this must be limited to a secured network. The default and intentional behavior from PyTorch is that the `TCPStore` interface listens on ALL interfaces, regardless of what IP address is provided. The IP address given was only used as a client-side address to use. vLLM was fixed to use a workaround to force the `TCPStore` instance to bind its socket to a specified private interface. As of version 0.8.5, vLLM limits the `TCPStore` socket to the private interface as configured.","published_at":"2025-05-20T17:32:27.034000Z","last_modified_at":null,"cvss_v3_score":9.8,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_v3_severity":"CRITICAL","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-502"],"nvd_references":["https://github.com/vllm-project/vllm/security/advisories/GHSA-hjq4-87xh-g4fv","https://github.com/vllm-project/vllm/pull/15988","https://github.com/vllm-project/vllm/commit/0d6e187e88874c39cda7409cf673f9e6546893e7","https://docs.vllm.ai/en/latest/deployment/security.html"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-28T23:27:09.632967Z"},"effective_severity":"CRITICAL","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"vllm-project","vendor_name":"vllm-project","product_slug":"vllm","product_name":"vllm","version_start":">= 0.6.5, < 0.8.5","version_start_inclusive":true,"version_end":">= 0.6.5, < 0.8.5","version_end_inclusive":true,"cpe23_uri":"cve5:vllm-project:vllm:>= 0.6.5, < 0.8.5:>= 0.6.5, < 0.8.5"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/vllm-project/vllm/security/advisories/GHSA-hjq4-87xh-g4fv","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://github.com/vllm-project/vllm/pull/15988","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/vllm-project/vllm/commit/0d6e187e88874c39cda7409cf673f9e6546893e7","source_type":"PATCH","tags":["patch"]},{"url":"https://docs.vllm.ai/en/latest/deployment/security.html","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2025-05-20T17:32:27.034000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:46:41.862821Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:46:41.862821Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:46:41.862821Z","label":"CVSS score revised","source":"cvelistv5"}]}