CVE-2026-64623

HIGHPre-NVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

Score 8.6 from GitHub Security Advisory (severity: HIGH) published 2026-07-20. the CNA's CVSS baseline 8.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 3 sources updated this weekElevated
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: Elevated riskExposed: 0

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

Network-AI before 5.13.4 contains an improper cryptographic signature verification vulnerability in APSAdapter where the default local verifier accepts any non-empty string as valid. Unauthenticated attackers can submit forged APS delegation payloads with arbitrary scopes to bypass signature verification and obtain signed permission-grant tokens for sensitive resources including SHELL_EXEC.

CVSS v3
8.6
EG Score
8.6(medium)
EG Risk
70(Attend)
EG Risk 70/100SSVC: Attend

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%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

July 20, 2026

Last Modified

August 14, 2026

Advisory Details (2)

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

Network-AI before 5.13.4 Cryptographic Signature Verification Bypass | Advisories | VulnCheck

https://www.vulncheck.com/advisories/network-ai-before-cryptographic-signature-verification-bypass
github Patch Available🟡 PoC Available

APSAdapter Default Local Verifier Accepts Any Non-Empty Signature · Advisory · Jovancoding/Network-AI · GitHub

https://github.com/Jovancoding/Network-AI/security/advisories/GHSA-3jf7-33vc-hgf4

Vendor Advisories for CVE-2026-64623(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 16× in last 7d / 87× 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 175 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-64623?
CVE-2026-64623 is a high vulnerability published on July 20, 2026. Network-AI before 5.13.4 contains an improper cryptographic signature verification vulnerability in APSAdapter where the default local verifier accepts any non-empty string as valid. Unauthenticated attackers can submit forged APS delegation payloads with arbitrary scopes to bypass signature…
When was CVE-2026-64623 disclosed?
CVE-2026-64623 was first published in the National Vulnerability Database on July 20, 2026, with the most recent update on August 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64623 actively exploited?
CVE-2026-64623 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 79.9% of all scored CVEs.
What is the CVSS score of CVE-2026-64623?
CVE-2026-64623 has a CVSS v4.0 base score of 8.6 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-64623?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64623, 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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