CVE catalog
CVE-2026-56340
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 submi
- Severity
- High · CVSS 8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.64% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Cpe | vllm | Not reported | 0.13.0 | fixed |
| Pip | vllm | Not reported | 0.13.0 | fixed |
| Cpe | vllm | Not reported | 0.13.0 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Cpe | vllm | cpe | Not reported | 0.13.0 | Not reported | Not reported | Not reported |
| Pip | vllm | pip | Not reported | 0.13.0 | Not reported | GHSA-MCMC-2M55-J8JJ | Not reported |
| Cpe | vllm | cpe | Not reported | 0.13.0 | Not reported | NVD-CVE-2026-56340 | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed:
References
- [https://access.redhat.com/security/cve/CVE-2026-56340]
- [https://bugzilla.redhat.com/show_bug.cgi?id=2491060]
- [https://github.com/advisories/GHSA-mcmc-2m55-j8jj]
- [https://github.com/vllm-project/vllm/security/advisories/GHSA-mcmc-2m55-j8jj]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-56340]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-56340.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2024.json]
- [https://www.vulncheck.com/advisories/vllm-denial-of-service-via-unvalidated-multimodal-embeddings]
[CERT-Bund public advisories] · [FIRST EPSS] · [GitHub Advisory Database] · [National Vulnerability Database (NVD)] · [Red Hat security advisories and VEX]