{"items":[{"id":"NVI-00009134","kind":"vulnerability","title":"vLLM: Responses API bypasses trust_request_chat_template for chat_template_kwargs","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-x567-49g5-p4cf","CVE-2026-115918"],"plain_summary":"GitHub lists this reviewed advisory for vllm. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-13b5068b0d99c6c0a8ef1d3a3dffa226"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-10-28T21:15:00.000Z","value":"6.5 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-c36ebc689ec549fd474193fd53a3e511"},{"kind":"CVSS","as_of":"2026-10-30T15:16:46.123Z","value":"6.5 MEDIUM (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-491d23946f7ce10233dc13b9b2dc4715"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.350%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.28701. Missing scores are unknown.","source_id":"sr-13b5068b0d99c6c0a8ef1d3a3dffa226"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-c36ebc689ec549fd474193fd53a3e511","url":"https://github.com/advisories/GHSA-x567-49g5-p4cf","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-x567-49g5-p4cf","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:56:08.420Z"},{"id":"sr-491d23946f7ce10233dc13b9b2dc4715","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-115918","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-115918","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-03T09:59:00.529Z"},{"id":"sr-13b5068b0d99c6c0a8ef1d3a3dffa226","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-115918","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.374Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-c36ebc689ec549fd474193fd53a3e511"],"technology":"vllm","known_exclusions":[],"conditions_summary":"## Summary\n\nvLLM's `/v1/responses` endpoint accepts request-level `chat_template_kwargs`, but does not apply the `--trust-request-chat-template` gate that protects Chat Completions, render, tokenize, and pooling paths.\n\nWhen the server is run with the documented default `trust_request_chat_template=False` and no explicit `--chat-template`, a Responses request can pass:\n\n```json\n{\"chat_template_kwargs\": {\"chat_template\": \"\"}}\n```\n\nThat key is preserved by `ChatParams.get_apply_chat_template_kwargs()` and then bound as the `chat_template` parameter to the shared HF renderer. Prior vLLM advisories establish that request-controlled Jinja chat templates can cause CPU/memory exhaustion. This report covers the current-head Responses sibling path missed by the earlier fixes.\n\n## Technical Details\n\nThe shared OpenAI frontend has a validation helper that rejects request-supplied chat templates unless the trust flag is enabled. It explicitly checks both top-level `chat_template` and `chat_template_kwargs[\"chat_template\"]`.\n\nResponses is a separate serving path:\n\n- `vllm/entrypoints/openai/responses/protocol.py` exposes `chat_template_kwargs`.\n- `ResponsesRequest.build","public_affected_ranges":[">= 0.16.0, < 0.32.0"]}],"null_published_at":"2026-11-05T19:10:23.239Z","source_updated_at":"2026-10-28T21:15:00.000Z","source_disclosed_at":"2026-10-28T21:14:59.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T21:56:08.420Z"},{"id":"NVI-00009134","kind":"vulnerability","title":"vLLM: Responses API bypasses trust_request_chat_template for chat_template_kwargs","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-x567-49g5-p4cf","CVE-2026-115918"],"plain_summary":"GitHub lists this reviewed advisory for vllm. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-13b5068b0d99c6c0a8ef1d3a3dffa226"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-10-28T21:15:00.000Z","value":"6.5 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-c36ebc689ec549fd474193fd53a3e511"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.350%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.28701. Missing scores are unknown.","source_id":"sr-13b5068b0d99c6c0a8ef1d3a3dffa226"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-c36ebc689ec549fd474193fd53a3e511","url":"https://github.com/advisories/GHSA-x567-49g5-p4cf","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-x567-49g5-p4cf","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:56:08.420Z"},{"id":"sr-13b5068b0d99c6c0a8ef1d3a3dffa226","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-115918","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.374Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-c36ebc689ec549fd474193fd53a3e511"],"technology":"vllm","known_exclusions":[],"conditions_summary":"## Summary\n\nvLLM's `/v1/responses` endpoint accepts request-level `chat_template_kwargs`, but does not apply the `--trust-request-chat-template` gate that protects Chat Completions, render, tokenize, and pooling paths.\n\nWhen the server is run with the documented default `trust_request_chat_template=False` and no explicit `--chat-template`, a Responses request can pass:\n\n```json\n{\"chat_template_kwargs\": {\"chat_template\": \"\"}}\n```\n\nThat key is preserved by `ChatParams.get_apply_chat_template_kwargs()` and then bound as the `chat_template` parameter to the shared HF renderer. Prior vLLM advisories establish that request-controlled Jinja chat templates can cause CPU/memory exhaustion. This report covers the current-head Responses sibling path missed by the earlier fixes.\n\n## Technical Details\n\nThe shared OpenAI frontend has a validation helper that rejects request-supplied chat templates unless the trust flag is enabled. It explicitly checks both top-level `chat_template` and `chat_template_kwargs[\"chat_template\"]`.\n\nResponses is a separate serving path:\n\n- `vllm/entrypoints/openai/responses/protocol.py` exposes `chat_template_kwargs`.\n- `ResponsesRequest.build","public_affected_ranges":[">= 0.16.0, < 0.32.0"]}],"null_published_at":"2026-10-31T22:13:48.413Z","source_updated_at":"2026-10-28T21:15:00.000Z","source_disclosed_at":"2026-10-28T21:14:59.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-10-31T21:56:08.420Z"}],"next_cursor":null,"snapshot_revision":"42594"}