{"id":"CVE-2026-73557","title":"vLLM is an inference and serving engine for large language models","summary":"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,…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","cwe":["CWE-362","CWE-367"],"vendor":"vllm","product":"vllm","affected":["vllm >= 0.21.0, < 0.26.0"],"patched":["vllm 0.26.0"],"published":"2026-08-13","updated":"2026-10-15","sourceUpdated":"2026-10-15T20:42:47.637","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73557","references":[{"url":"https://github.com/vllm-project/vllm/commit/793cf79c89d4049124e756915468ac30318f2e50","label":"security-advisories@github.com"},{"url":"https://github.com/vllm-project/vllm/pull/48583","label":"security-advisories@github.com"},{"url":"https://github.com/vllm-project/vllm/releases/tag/v0.26.0","label":"security-advisories@github.com"},{"url":"https://github.com/vllm-project/vllm/security/advisories/GHSA-pr7f-p5mw-fc87","label":"security-advisories@github.com"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-73557"},{"url":"https://github.com/advisories/GHSA-pr7f-p5mw-fc87"},{"url":"https://github.com/vllm-project/vllm"},{"url":"https://pypi.org/project/vllm"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-73557.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-73557"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2515401"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-73557"},{"url":"https://access.redhat.com/errata/RHSA-2026:82415"},{"url":"https://access.redhat.com/errata/RHSA-2026:82368"},{"url":"https://access.redhat.com/errata/RHSA-2026:82061"},{"url":"https://access.redhat.com/errata/RHSA-2026:82059"},{"url":"https://access.redhat.com/errata/RHSA-2026:82371"}],"tags":["nvd","ghsa","pip","osv","csaf","vex","red-hat"],"epss":0.00247,"epssPercentile":0.15951,"aliases":["GHSA-pr7f-p5mw-fc87","PYSEC-2026-3938"],"ecosystem":"pip","ingestedAt":"2026-09-04T22:28:54.863Z","slug":"CVE-2026-73557","body":"## Overview\n\nvLLM 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.\n\n## Affected\n\n- `vllm >= 0.21.0, < 0.26.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `vllm 0.26.0`\n\n## Package advisory (CVE-2026-73557)\n\nAffected packages:\n\n- `vllm >= 0.21.0, < 0.26.0`\n\nPatched in:\n\n- `vllm 0.26.0`\n\nSource: https://github.com/advisories/GHSA-pr7f-p5mw-fc87\n\n## Vendor advisories\n\n- **RHSA-2026:82415** · Red Hat · fixed in: Red Hat AI Inference Server 3.5 · released 2026-10-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:82415)\n- **RHSA-2026:82368** · Red Hat · fixed in: Red Hat AI Inference Server 3.5 · released 2026-10-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:82368)\n- **RHSA-2026:82061** · Red Hat · fixed in: Red Hat AI Inference Server 3.5 · released 2026-10-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:82061)\n- **RHSA-2026:82059** · Red Hat · fixed in: Red Hat AI Inference Server 3.5 · released 2026-10-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:82059)\n- **RHSA-2026:82371** · Red Hat · fixed in: Red Hat AI Inference Server 3.5 · released 2026-10-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:82371)","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":220029,"id":"CVE-2026-73557","ts":1791978511748,"field":"cvss","old":null,"new":"5.3"}]}