CVE-2026-56340

HIGHNVD 7.58.8▲
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-20. NVD baseline CVSS 7.5; sources differ by 1.3.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
7.5
EG Score
8.8(medium)
EPSS
27.2%
KEV
Not listed

Published

June 20, 2026

Last Modified

June 30, 2026

Advisory Details (2)

Auto-updated Jun 20, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

vLLM - Denial of Service via Unvalidated Multimodal Embeddings | Advisories | VulnCheck

https://www.vulncheck.com/advisories/vllm-denial-of-service-via-unvalidated-multimodal-embeddings
github Patch Available🟡 PoC Available

Missing validation of multimodal embeddings leading to DoS and potential RCE · Advisory · vllm-project/vllm · GitHub

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

Vendor Advisories for CVE-2026-56340(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 36× in last 7d / 81× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-06 22:40 UTCEG score recompute
  2. 2026-07-06 22:40 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 09:29 UTCEG score recompute
  6. 2026-07-06 09:29 UTCGHSA enrichment
  7. 2026-07-06 02:23 UTCEPSS rescore
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-05 19:56 UTCEG score recompute
  10. 2026-07-05 19:56 UTCGHSA enrichment
  11. 2026-07-05 06:46 UTCEG score recompute
  12. 2026-07-05 06:46 UTCGHSA enrichment
  13. 2026-07-05 02:31 UTCEPSS rescore
  14. 2026-07-05 02:30 UTCEPSS rescore
  15. 2026-07-04 17:30 UTCEG score recompute
  16. 2026-07-04 17:30 UTCGHSA enrichment
  17. 2026-07-04 06:31 UTCEPSS rescore
  18. 2026-07-04 06:31 UTCEPSS rescore
  19. 2026-07-04 04:19 UTCEG score recompute
  20. 2026-07-04 04:19 UTCGHSA enrichment
  21. 2026-07-03 14:36 UTCEG score recompute
  22. 2026-07-03 14:36 UTCGHSA enrichment
  23. 2026-07-03 01:26 UTCEG score recompute
  24. 2026-07-03 01:26 UTCGHSA enrichment
  25. 2026-07-02 12:15 UTCEG score recompute
Show 56 more
  1. 2026-07-02 12:15 UTCGHSA enrichment
  2. 2026-07-01 23:03 UTCEG score recompute
  3. 2026-07-01 23:03 UTCGHSA enrichment
  4. 2026-07-01 15:07 UTCEPSS rescore
  5. 2026-07-01 09:52 UTCEG score recompute
  6. 2026-07-01 09:52 UTCGHSA enrichment
  7. 2026-06-30 23:22 UTCEPSS rescore
  8. 2026-06-30 20:41 UTCEG score recompute
  9. 2026-06-30 20:41 UTCGHSA enrichment
  10. 2026-06-30 07:26 UTCEG score recompute
  11. 2026-06-30 07:26 UTCGHSA enrichment
  12. 2026-06-29 18:16 UTCEG score recompute
  13. 2026-06-29 18:16 UTCGHSA enrichment
  14. 2026-06-29 14:06 UTCEPSS rescore
  15. 2026-06-29 14:06 UTCEPSS rescore
  16. 2026-06-29 05:03 UTCEG score recompute
  17. 2026-06-29 05:03 UTCGHSA enrichment
  18. 2026-06-28 15:52 UTCEG score recompute
  19. 2026-06-28 15:52 UTCGHSA enrichment
  20. 2026-06-28 14:07 UTCEPSS rescore
  21. 2026-06-28 04:56 UTCEPSS rescore
  22. 2026-06-28 04:56 UTCEPSS rescore
  23. 2026-06-28 02:42 UTCEG score recompute
  24. 2026-06-28 02:42 UTCGHSA enrichment
  25. 2026-06-27 13:32 UTCEG score recompute
  26. 2026-06-27 13:32 UTCGHSA enrichment
  27. 2026-06-27 03:08 UTCEPSS rescore
  28. 2026-06-27 00:21 UTCEG score recompute
  29. 2026-06-27 00:21 UTCGHSA enrichment
  30. 2026-06-26 21:42 UTCNVD updateCVSS v3 → 7.5
  31. 2026-06-26 11:10 UTCEG score recompute
  32. 2026-06-26 11:10 UTCGHSA enrichment
  33. 2026-06-25 19:04 UTCEG score recompute
  34. 2026-06-25 19:04 UTCGHSA enrichment
  35. 2026-06-25 13:49 UTCEPSS rescore
  36. 2026-06-25 05:53 UTCEG score recompute
  37. 2026-06-25 05:53 UTCGHSA enrichment
  38. 2026-06-24 16:38 UTCEG score recompute
  39. 2026-06-24 16:38 UTCGHSA enrichment
  40. 2026-06-24 14:05 UTCEPSS rescore
  41. 2026-06-24 03:27 UTCEG score recompute
  42. 2026-06-24 03:27 UTCGHSA enrichment
  43. 2026-06-23 21:33 UTCEPSS rescore
  44. 2026-06-23 21:33 UTCEPSS rescore
  45. 2026-06-23 14:16 UTCEG score recompute
  46. 2026-06-23 14:16 UTCGHSA enrichment
  47. 2026-06-23 01:06 UTCEG score recompute
  48. 2026-06-23 01:05 UTCGHSA enrichment
  49. 2026-06-22 11:53 UTCEG score recompute
  50. 2026-06-22 11:53 UTCGHSA enrichment
  51. 2026-06-21 22:42 UTCEG score recompute
  52. 2026-06-21 22:42 UTCGHSA enrichment
  53. 2026-06-21 09:30 UTCEG score recompute
  54. 2026-06-21 09:30 UTCGHSA enrichment
  55. 2026-06-20 20:16 UTCEG score recompute
  56. 2026-06-20 20:15 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-56340?
CVE-2026-56340 is a high vulnerability published on June 20, 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…
When was CVE-2026-56340 disclosed?
CVE-2026-56340 was first published in the National Vulnerability Database on June 20, 2026, with the most recent update on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56340 actively exploited?
CVE-2026-56340 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 27.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-56340?
CVE-2026-56340 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 8.8.
How do I remediate CVE-2026-56340?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56340, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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