{"cve":"CVE-2026-71486","nvd":{"published":"2026-08-17T20:16:45.927","modified":"2026-10-23T16:10:00.313","status":"Analyzed","description":"vLLM is an inference and serving engine for large language models. Prior to 0.26.0, the /v1/completions/derender and /v1/chat/completions/derender endpoints accept caller-supplied GenerateResponse objects whose generate_responses, choices, token_ids, prompt_logprobs, logprobs.content, top_logprobs, and routed_experts structures are processed by OnlineDerenderer and tokenizer.decode before max_model_len, max_tokens, max_num_seqs, or response-size limits are enforced, allowing an authenticated API client to consume excessive CPU and memory and produce oversized responses. This issue is fixed in version 0.26.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","score":4.3},"cwes":["CWE-400","CWE-770"],"references":["https://github.com/vllm-project/vllm/commit/8e61b646e2d157f9b93451fa048f9c8530c8a67b","https://github.com/vllm-project/vllm/pull/47260","https://github.com/vllm-project/vllm/releases/tag/v0.26.0","https://github.com/vllm-project/vllm/security/advisories/GHSA-8737-qx52-hjff"],"products":["vllm:vllm"],"source":"nvd","synced_at":"2026-10-23T16:39:26.291718493+00:00"},"epss":{"cve":"CVE-2026-71486","score":0.00374,"percentile":0.31047,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-8737-qx52-hjff","url":"https://osv.dev/vulnerability/GHSA-8737-qx52-hjff","summary":"vLLM: Derender endpoints decode caller-supplied GenerateResponse token IDs without output bounds","modified":"2026-09-10T12:25:59.795420084Z","packages":[{"ecosystem":"PyPI","name":"vllm","purl":"pkg:pypi/vllm","ranges":["<0.26.0"],"fixed":["0.26.0"]}]},{"id":"PYSEC-2026-3936","url":"https://osv.dev/vulnerability/PYSEC-2026-3936","summary":"vLLM: Derender endpoints decode caller-supplied GenerateResponse token IDs without output bounds","modified":"2026-09-10T12:15:15.570827433Z","packages":[{"ecosystem":"PyPI","name":"vllm","purl":"pkg:pypi/vllm","ranges":["<0.26.0"],"fixed":["0.26.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}