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
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 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)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
48%
KEV
Not listed

Published

June 20, 2026

Last Modified

July 22, 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.

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
vllm0.10.2, 0.11.0, 0.11.1, 0.11.2, 0.12.00.13.0—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 99× 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.

Showing the most recent 100 of 205 total refreshes for this CVE.

  1. 2026-08-26 14:46 UTCEPSS rescore
  2. 2026-08-25 13:49 UTCEPSS rescore
  3. 2026-08-25 03:47 UTCGHSA enrichment
  4. 2026-08-24 14:37 UTCEG score recompute
  5. 2026-08-24 14:37 UTCGHSA enrichment
  6. 2026-08-24 01:26 UTCGHSA enrichment
  7. 2026-08-23 12:11 UTCEG score recompute
  8. 2026-08-23 12:11 UTCGHSA enrichment
  9. 2026-08-23 00:19 UTCEPSS rescore
  10. 2026-08-22 23:01 UTCEG score recompute
  11. 2026-08-22 23:01 UTCGHSA enrichment
  12. 2026-08-21 23:49 UTCEPSS rescore
  13. 2026-08-21 23:31 UTCGHSA enrichment
  14. 2026-08-21 10:15 UTCEG score recompute
  15. 2026-08-21 10:15 UTCGHSA enrichment
  16. 2026-08-20 22:55 UTCEPSS rescore
  17. 2026-08-20 21:04 UTCGHSA enrichment
  18. 2026-08-20 07:54 UTCEG score recompute
  19. 2026-08-20 07:54 UTCGHSA enrichment
  20. 2026-08-19 17:04 UTCEPSS rescore
  21. 2026-08-19 05:48 UTCEG score recompute
  22. 2026-08-19 05:48 UTCGHSA enrichment
  23. 2026-08-18 13:48 UTCEPSS rescore
  24. 2026-08-17 13:47 UTCEPSS rescore
  25. 2026-08-17 13:35 UTCGHSA enrichment
Show 75 more
  1. 2026-08-17 00:20 UTCEG score recompute
  2. 2026-08-17 00:20 UTCGHSA enrichment
  3. 2026-08-16 14:56 UTCEPSS rescore
  4. 2026-08-16 11:10 UTCEG score recompute
  5. 2026-08-16 11:10 UTCGHSA enrichment
  6. 2026-08-16 02:14 UTCEPSS rescore
  7. 2026-08-15 22:00 UTCGHSA enrichment
  8. 2026-08-15 08:50 UTCEG score recompute
  9. 2026-08-15 08:50 UTCGHSA enrichment
  10. 2026-08-15 01:30 UTCEPSS rescore
  11. 2026-08-14 17:03 UTCGHSA enrichment
  12. 2026-08-14 03:52 UTCEG score recompute
  13. 2026-08-14 03:52 UTCGHSA enrichment
  14. 2026-08-13 22:00 UTCEPSS rescore
  15. 2026-08-13 14:42 UTCGHSA enrichment
  16. 2026-08-13 01:31 UTCEG score recompute
  17. 2026-08-13 01:31 UTCGHSA enrichment
  18. 2026-08-12 13:51 UTCEPSS rescore
  19. 2026-08-12 12:21 UTCGHSA enrichment
  20. 2026-08-11 22:56 UTCEG score recompute
  21. 2026-08-11 22:56 UTCGHSA enrichment
  22. 2026-08-11 09:47 UTCEG score recompute
  23. 2026-08-11 09:47 UTCGHSA enrichment
  24. 2026-08-11 00:00 UTCEPSS rescore
  25. 2026-08-10 20:36 UTCGHSA enrichment
  26. 2026-08-10 07:19 UTCGHSA enrichment
  27. 2026-08-09 18:09 UTCEG score recompute
  28. 2026-08-09 18:09 UTCGHSA enrichment
  29. 2026-08-09 13:46 UTCEPSS rescore
  30. 2026-08-09 04:59 UTCEG score recompute
  31. 2026-08-09 04:59 UTCGHSA enrichment
  32. 2026-08-08 16:37 UTCEPSS rescore
  33. 2026-08-08 15:49 UTCGHSA enrichment
  34. 2026-08-08 02:38 UTCEG score recompute
  35. 2026-08-08 02:38 UTCGHSA enrichment
  36. 2026-08-07 13:28 UTCGHSA enrichment
  37. 2026-08-07 00:18 UTCEG score recompute
  38. 2026-08-07 00:18 UTCGHSA enrichment
  39. 2026-08-06 13:47 UTCEPSS rescore
  40. 2026-08-06 11:08 UTCGHSA enrichment
  41. 2026-08-05 21:57 UTCEG score recompute
  42. 2026-08-05 21:57 UTCGHSA enrichment
  43. 2026-08-05 19:17 UTCEPSS rescore
  44. 2026-08-05 08:48 UTCGHSA enrichment
  45. 2026-08-04 18:30 UTCEG score recompute
  46. 2026-08-04 18:30 UTCGHSA enrichment
  47. 2026-08-04 15:10 UTCEPSS rescore
  48. 2026-08-04 10:39 UTCEPSS rescore
  49. 2026-08-04 04:56 UTCGHSA enrichment
  50. 2026-08-03 15:46 UTCEG score recompute
  51. 2026-08-03 15:46 UTCGHSA enrichment
  52. 2026-08-03 10:36 UTCEPSS rescore
  53. 2026-08-03 02:36 UTCGHSA enrichment
  54. 2026-08-02 13:26 UTCEG score recompute
  55. 2026-08-02 13:26 UTCGHSA enrichment
  56. 2026-08-02 02:27 UTCEPSS rescore
  57. 2026-08-02 00:16 UTCGHSA enrichment
  58. 2026-08-01 11:04 UTCEG score recompute
  59. 2026-08-01 11:04 UTCGHSA enrichment
  60. 2026-08-01 04:16 UTCEPSS rescore
  61. 2026-07-31 21:54 UTCGHSA enrichment
  62. 2026-07-31 08:42 UTCGHSA enrichment
  63. 2026-07-30 19:29 UTCEG score recompute
  64. 2026-07-30 19:29 UTCGHSA enrichment
  65. 2026-07-30 16:28 UTCEPSS rescore
  66. 2026-07-30 03:55 UTCEG score recompute
  67. 2026-07-30 03:55 UTCGHSA enrichment
  68. 2026-07-30 01:30 UTCEPSS rescore
  69. 2026-07-30 01:30 UTCEPSS rescore
  70. 2026-07-29 14:42 UTCGHSA enrichment
  71. 2026-07-29 01:31 UTCEG score recompute
  72. 2026-07-29 01:31 UTCGHSA enrichment
  73. 2026-07-28 15:37 UTCEPSS rescore
  74. 2026-07-28 10:28 UTCGHSA enrichment
  75. 2026-07-27 21:17 UTCEG score recompute

Related CVEs(same CWE)

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 July 22, 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 1% probability of exploitation in the next 30 days, which ranks it in the top 51.8% of all scored CVEs.
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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