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AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-787

https://access.redhat.com/security/cve/CVE-2026-56340

https://bugzilla.redhat.com/show_bug.cgi?id=2491060

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-56340.json

[{"vendor":"Red Hat","product":"Red Hat AI Inference Server","defaultStatus":"affected","cpes":["cpe:/a:redhat:ai_inference_server:3"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux AI (RHEL AI) 3","defaultStatus":"unaffected","cpes":["cpe:/a:redhat:enterprise_linux_ai:3"]},{"vendor":"Red Hat","product":"Red Hat OpenShift AI (RHOAI)","defaultStatus":"unaffected","cpes":["cpe:/a:redhat:openshift_ai"]}]

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD-CWE-noinfo

OR
          *cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:* versions from (including) 0.10.2 up to (excluding) 0.13.0

VulnCheck: https://github.com/vllm-project/vllm/security/advisories/GHSA-mcmc-2m55-j8jj Types: Vendor Advisory

VulnCheck: https://www.vulncheck.com/advisories/vllm-denial-of-service-via-unvalidated-multimodal-embeddings Types: Third Party Advisory

{"timestamp":"2026-06-24T15:54:59.666959Z","id":"CVE-2026-56340","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}

vLLM versions >= 0.10.2 and < 0.13.0 are missing sparse tensor validation in multimodal embeddings processing. Because PyTorch disables sparse tensor invariant checks by default, an attacker can submit crafted embedding requests with malformed (negative or out-of-bounds) tensor indices, when the prompt-embeds feature is enabled, to trigger crashes or resource exhaustion (denial of service), with potential for out-of-bounds/write-what-where memory corruption. This continues CVE-2025-62164, whose prior fix only disabled the feature by default rather than addressing the root cause.

AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-20

https://github.com/vllm-project/vllm/security/advisories/GHSA-mcmc-2m55-j8jj

https://www.vulncheck.com/advisories/vllm-denial-of-service-via-unvalidated-multimodal-embeddings

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