Medium severity5.3NVD Advisory· Published Aug 13, 2026· Updated Oct 15, 2026
CVE-2026-73557
CVE-2026-73557
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. This issue is fixed in version 0.26.0.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
vllmPyPI | >= 0.21.0, < 0.26.0 | 0.26.0 |
Affected products
3Patches
Vulnerability mechanics
References
6- github.com/vllm-project/vllm/commit/793cf79c89d4049124e756915468ac30318f2e50nvdPatchWEB
- github.com/vllm-project/vllm/pull/48583nvdIssue TrackingPatchWEB
- github.com/advisories/GHSA-pr7f-p5mw-fc87ghsaADVISORY
- github.com/vllm-project/vllm/security/advisories/GHSA-pr7f-p5mw-fc87nvdMitigationVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-73557ghsaADVISORY
- github.com/vllm-project/vllm/releases/tag/v0.26.0nvdRelease NotesWEB
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