Vulnerability · Published Aug 18, 2026 · Assigned by VulnCheck

CVE-2026-75853ArcadeDB Gremlin Wire Protocol Authorization Bypass Cross-Database

High 8.8

In plain English

A high-severity missing authorization in arcadedb from ArcadeData. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.6%top 51.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

ArcadeDB's Gremlin wire-protocol plugin (com.arcadedb:arcadedb-gremlin) in versions <= 26.7.3 enforces authentication (SASL PLAIN) but performs no authorization: it never checks database access permissions (canAccessToDatabase) and never binds the authenticated principal into the engine. As a result, any valid server credential — even one provisioned for zero or one unrelated database — can read, write, and drop data in any database on the server by selecting a target database via a traversal-source alias, completely bypassing the engine's per-type/read-only/UPDATE_SCHEMA ACLs. The issue is fixed in version 26.8.1.

Affected products (as reported)

Vendor	Product	Versions
ArcadeData	arcadedb	0 – before 26.8.1

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

GitHub Security Advisory (GHSA-c287-v325-j5jx) vendor-advisory
VulnCheck Advisory: ArcadeDB Gremlin Wire Protocol Authorization Bypass Cross-Database third-party-advisory