CVE-2026-54609

HIGHPre-NVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

Score 8.6 from GitHub Security Advisory (severity: HIGH) published 2026-07-28. a secondary CVSS source baseline 8.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.6Exploit: None knownExposed: 0

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

QTI Neon is a minimal, game-agnostic, relay-based UDP multiplayer protocol library. In version 1.0.0, the relay's handleReconnectRequest forwards RECONNECT_REQUEST packets to the host without bounding them, so an unauthenticated client can drive relay-to-host amplification and cause a denial of service on the host. No fixed version is available as of this review.

CVSS v3
8.6
EG Score
8.6(medium)
EG Risk
43(Track)
EG Risk 43/100SSVC: 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
Severity86% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
18%
KEV
Not listed

Published

July 28, 2026

Last Modified

July 30, 2026

Advisory Details (1)

Auto-updated Jul 28, 2026
Patch available. Sources: github.
github Patch Available

Unauthenticated relay-to-host amplification via unbounded RECONNECT_REQUEST forwarding · Advisory · Quiet-Terminal-Interactive/QTINeon · GitHub

https://github.com/Quiet-Terminal-Interactive/QTINeon/security/advisories/GHSA-85rg-p3fr-xc2f

Vendor Advisories for CVE-2026-54609(1)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
mavencom.quietterminal:qti-neon—ghsa
npmqti-neon—ghsa
pipqti-neon—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(3 across 3 ecosystems)
Maven(1)
PackageVulnerable rangeFixed inDependents
com.quietterminal:qti-neon1.0.0——
npm(1)
PackageVulnerable rangeFixed inDependents
qti-neon1.0.0——
PyPI(1)
PackageVulnerable rangeFixed inDependents
qti-neon1.0.0——

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 24× in last 7d / 95× 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 192 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-54609?
CVE-2026-54609 is a high vulnerability published on July 28, 2026. QTI Neon is a minimal, game-agnostic, relay-based UDP multiplayer protocol library. In version 1.0.0, the relay's handleReconnectRequest forwards RECONNECT_REQUEST packets to the host without bounding them, so an unauthenticated client can drive relay-to-host amplification and cause a denial of…
When was CVE-2026-54609 disclosed?
CVE-2026-54609 was first published in the National Vulnerability Database on July 28, 2026, with the most recent update on July 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54609 actively exploited?
CVE-2026-54609 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 81.6% of all scored CVEs.
What is the CVSS score of CVE-2026-54609?
CVE-2026-54609 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2026-54609?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54609, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-54609

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