CVE-2026-75851

CRITICALPre-NVD 9.99.9—
EchelonGraph scoreHIGH confidence

Score 9.9 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-18. a secondary CVSS source baseline 9.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
9.9EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.9Exploit: Elevated riskExposed: 0

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

ArcadeDB server (com.arcadedb:arcadedb-server) in versions 26.7.3 and earlier fails to propagate the authenticated principal to asynchronous command worker threads. When an HTTP command is submitted with awaitResponse:false, it executes on an async worker whose DatabaseContext has no bound user, causing the scripting authorization gate to become a no-op. A user with only read access to a single database can submit an asynchronous JavaScript (language=js) command via the /api/v1/command endpoint to run code with unrestricted host access (e.g., database.getSecurity().createUser) and create a server-wide administrator, escalating to full administrative control. Fixed in 26.8.1.

CVSS v3
9.9
EG Score
9.9(high)
EG Risk
61(Track*)
EG Risk 61/100SSVC: 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
Severity99% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
24%
KEV
Not listed

Published

August 18, 2026

Last Modified

August 18, 2026

Advisory Details (2)

Auto-updated Aug 18, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

HTTP async command path bypasses scripting authorization gate, allowing reader to escalate to server admin · Advisory · ArcadeData/arcadedb · GitHub

https://github.com/ArcadeData/arcadedb/security/advisories/GHSA-5j4x-3jfw-8xv3
generic

ArcadeDB before 26.8.1 Authentication Bypass via Async Command | Advisories | VulnCheck

https://www.vulncheck.com/advisories/arcadedb-before-authentication-bypass-via-async-command

Vendor Advisories for CVE-2026-75851(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 29× in last 7d / 29× 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. 2026-08-21 05:58 UTCGHSA enrichment
  2. 2026-08-21 02:02 UTCEG score recompute
  3. 2026-08-21 02:02 UTCGHSA enrichment
  4. 2026-08-20 22:56 UTCEPSS rescore
  5. 2026-08-20 22:06 UTCGHSA enrichment
  6. 2026-08-20 18:11 UTCGHSA enrichment
  7. 2026-08-20 14:15 UTCGHSA enrichment
  8. 2026-08-20 10:13 UTCGHSA enrichment
  9. 2026-08-20 06:17 UTCGHSA enrichment
  10. 2026-08-20 02:22 UTCGHSA enrichment
  11. 2026-08-19 22:26 UTCGHSA enrichment
  12. 2026-08-19 18:30 UTCEG score recompute
  13. 2026-08-19 18:30 UTCGHSA enrichment
  14. 2026-08-19 17:04 UTCEPSS rescore
  15. 2026-08-19 14:35 UTCGHSA enrichment
  16. 2026-08-19 10:40 UTCGHSA enrichment
  17. 2026-08-19 06:42 UTCGHSA enrichment
  18. 2026-08-19 02:45 UTCGHSA enrichment
  19. 2026-08-18 22:46 UTCGHSA enrichment
  20. 2026-08-18 18:42 UTCEG score recompute
  21. 2026-08-18 18:42 UTCGHSA enrichment
  22. 2026-08-18 14:46 UTCEG score recompute
  23. 2026-08-18 14:46 UTCGHSA enrichment
  24. 2026-08-18 13:48 UTCEG score recompute
  25. 2026-08-18 13:48 UTCGHSA enrichment
Show 4 more
  1. 2026-08-18 12:33 UTCEG score recompute
  2. 2026-08-18 12:33 UTCGHSA enrichment
  3. 2026-08-18 11:29 UTCEG score recompute
  4. 2026-08-18 11:29 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-75851?
CVE-2026-75851 is a critical vulnerability published on August 18, 2026. ArcadeDB server (com.arcadedb:arcadedb-server) in versions 26.7.3 and earlier fails to propagate the authenticated principal to asynchronous command worker threads. When an HTTP command is submitted with awaitResponse:false, it executes on an async worker whose DatabaseContext has no bound user,…
When was CVE-2026-75851 disclosed?
CVE-2026-75851 was first published in the National Vulnerability Database on August 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-75851 actively exploited?
CVE-2026-75851 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 75.5% of all scored CVEs.
What is the CVSS score of CVE-2026-75851?
CVE-2026-75851 has a CVSS v3 base score of 9.9 (NVD).
How do I remediate CVE-2026-75851?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-75851, 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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