{"action":"Upgrade vllm to 0.29.0 or later.","affected":[{"fixed":"0.29.0","introduced":"0"}],"component":"vllm","cve_ids":["CVE-2026-93840"],"ecosystem":"PyPI","epss":0.00246,"exploited":false,"fixed_versions":["0.29.0"],"id":"tcs_01M5KH95FEEVC61E4BCWSXBAJP","modified_at":"2026-09-29T09:00:03.007796760Z","published_at":"2026-09-18T20:17:34.200Z","references":["https://osv.dev/vulnerability/PYSEC-2026-3998","https://github.com/vllm-project/vllm/blob/v0.28.0/vllm/sampling_params.py#L881-L903","https://github.com/vllm-project/vllm/blob/v0.28.0/vllm/v1/worker/gpu/sample/logit_bias.py#L179-L191","https://www.vulncheck.com/advisories/vllm-before-0.29.0-cross-request-logits-corruption-via-allowed-token-ids","https://github.com/vllm-project/vllm/commit/5b0e5b69ac1a3884a6479c9537789c95263cc804","https://github.com/vllm-project/vllm/pull/49080","https://github.com/vllm-project/vllm"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"PYSEC-2026-3998","url":"https://osv.dev/vulnerability/PYSEC-2026-3998"}],"summary":"vLLM before 0.29.0 validates allowed_token_ids against tokenizer length instead of model output logits width in SamplingParams._validate_allowed_token_ids(). Attackers can supply token IDs above the o"}