{"id":"CVE-2026-73557","summary":"vLLM: Incomplete CVE-2025-62164 remediation can be bypassed by concurrent prompt parts","details":"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. This issue is fixed in version 0.26.0.","aliases":["GHSA-pr7f-p5mw-fc87"],"modified":"2026-08-15T11:47:58.345174652Z","published":"2026-08-13T15:00:15.746Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-362"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73557.json"},"references":[{"type":"WEB","url":"https://github.com/vllm-project/vllm/releases/tag/v0.26.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73557.json"},{"type":"ADVISORY","url":"https://github.com/vllm-project/vllm/security/advisories/GHSA-pr7f-p5mw-fc87"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-73557"},{"type":"FIX","url":"https://github.com/vllm-project/vllm/commit/793cf79c89d4049124e756915468ac30318f2e50"},{"type":"FIX","url":"https://github.com/vllm-project/vllm/pull/48583"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/vllm-project/vllm","events":[{"introduced":"e6ff3e9c83a6520c3793f4e0511ac8591a07c243"},{"fixed":"793cf79c89d4049124e756915468ac30318f2e50"},{"fixed":"ffd46bfab2128bb84146050e98b51a617c6575ab"}],"database_specific":{"extracted_events":[{"introduced":"0.20.2rc0"},{"fixed":"0.26.0"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v0.26.0rc1","v0.25.0","v0.23.1rc0","v0.22.1rc0","v0.21.1rc0","v0.20.2rc0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-73557.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"}]}