CVE-2026-75843

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 before 26.8.1 fails to bind the authenticated principal on the gRPC transaction executor thread in beginTransaction, allowing authenticated readers to execute JavaScript commands without scripting authorization checks. Attackers can execute executeCommand with a transaction ID to run unrestricted JavaScript that creates server-wide administrator accounts.

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
23%
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

gRPC external-transaction 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-p29f-345w-4qwf
generic

ArcadeDB before 26.8.1 Privilege Escalation via gRPC Transaction | Advisories | VulnCheck

https://www.vulncheck.com/advisories/arcadedb-before-privilege-escalation-via-grpc-transaction

Vendor Advisories for CVE-2026-75843(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 27× in last 7d / 27× 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 05:10 UTCGHSA enrichment
  2. 2026-08-21 00:48 UTCEG score recompute
  3. 2026-08-21 00:48 UTCGHSA enrichment
  4. 2026-08-20 22:56 UTCEPSS rescore
  5. 2026-08-20 20:27 UTCGHSA enrichment
  6. 2026-08-20 16:06 UTCGHSA enrichment
  7. 2026-08-20 11:44 UTCGHSA enrichment
  8. 2026-08-20 07:21 UTCGHSA enrichment
  9. 2026-08-20 02:59 UTCGHSA enrichment
  10. 2026-08-19 22:38 UTCGHSA enrichment
  11. 2026-08-19 18:16 UTCEG score recompute
  12. 2026-08-19 18:16 UTCGHSA enrichment
  13. 2026-08-19 17:04 UTCEPSS rescore
  14. 2026-08-19 12:36 UTCGHSA enrichment
  15. 2026-08-19 08:15 UTCGHSA enrichment
  16. 2026-08-19 03:53 UTCGHSA enrichment
  17. 2026-08-18 23:32 UTCGHSA enrichment
  18. 2026-08-18 19:09 UTCEG score recompute
  19. 2026-08-18 19:09 UTCGHSA enrichment
  20. 2026-08-18 14:46 UTCEG score recompute
  21. 2026-08-18 14:46 UTCGHSA enrichment
  22. 2026-08-18 13:48 UTCEG score recompute
  23. 2026-08-18 13:48 UTCGHSA enrichment
  24. 2026-08-18 12:34 UTCEG score recompute
  25. 2026-08-18 12:34 UTCGHSA enrichment
Show 2 more
  1. 2026-08-18 11:29 UTCEG score recompute
  2. 2026-08-18 11:29 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-75843?
CVE-2026-75843 is a critical vulnerability published on August 18, 2026. ArcadeDB before 26.8.1 fails to bind the authenticated principal on the gRPC transaction executor thread in beginTransaction, allowing authenticated readers to execute JavaScript commands without scripting authorization checks. Attackers can execute executeCommand with a transaction ID to run…
When was CVE-2026-75843 disclosed?
CVE-2026-75843 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-2026-75843 actively exploited?
CVE-2026-75843 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 76.9% of all scored CVEs.
What is the CVSS score of CVE-2026-75843?
CVE-2026-75843 has a CVSS v3 base score of 9.9 (NVD).
How do I remediate CVE-2026-75843?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-75843, 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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