{"schemaVersion":3,"id":"CVE-2026-73557","aliases":["GHSA-pr7f-p5mw-fc87","PYSEC-2026-3938","CGA-rp8v-p53j-vj88"],"status":"published","duplicateOf":null,"title":null,"description":"vLLM is an inference and serving engine for large language models. From 0.20.2rc0 until 0.26.0, safe_load_prompt_embeds in vllm/renderers/embed_utils.py uses torch.sparse.check_sparse_tensor_invariants, whose process-global save, enable, and restore state can be raced by concurrent prompt_embeds parts submitted to POST /v1/chat/completions through AsyncMultiModalItemTracker.resolve_items, asyncio.gather, and the default executor, allowing an invalid sparse tensor to reach tensor.to_dense despite the CVE-2025-62164 guard when enable_prompt_embeds is enabled. 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