CVE-2026-75853
Received Received - Intake

ArcadeDB Gremlin Plugin Authentication Bypass via Missing Authorization

Publication date: 2026-08-18

Last updated on: 2026-08-18

Assigner: VulnCheck

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.

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Meta Information

Published
2026-08-18
Last Modified
2026-08-18
Generated
2026-08-18
AI Q&A
2026-08-18
EPSS Evaluated
N/A
NVD
CVE-2026-75853
EUVD
EUVD-2026-60614

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
arcadedb arcadedb-gremlin to 26.8.1 (exc)
arcadedb arcadedb-gremlin 26.8.1

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

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Executive Summary

This vulnerability affects ArcadeDB's Gremlin wire-protocol plugin (versions <= 26.7.3). It enforces authentication but lacks authorization checks, allowing any valid server credential to bypass database access permissions and perform unauthorized read, write, or delete operations across all databases on the server.

Detection Guidance

Check ArcadeDB Gremlin plugin version with: grep -r 'arcadedb-gremlin' /path/to/dependencies. If version <= 26.7.3, the system is vulnerable. Monitor for unauthorized database access attempts or unusual cross-database operations in logs.

Impact Analysis

An attacker with valid credentials can access, modify, or delete data in any database on the server, even if those credentials were intended for minimal or unrelated access. This bypasses security controls like read-only restrictions and schema updates.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating confidentiality and integrity requirements in GDPR and HIPAA. It undermines access control measures, potentially resulting in non-compliance and data breaches.

Mitigation Strategies

Upgrade the ArcadeDB Gremlin plugin to version 26.8.1 or later immediately. Disable the Gremlin wire-protocol plugin if not required. Review database access logs for signs of exploitation and restrict server credentials to least privilege.

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