Auth bypass in Arcadedata Arcadedb
CVE-2026-75853
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.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (46.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.006 · change: +0.002
Affected products
Weakness classification (CWE)
References
- github.com/ArcadeData/arcadedb/security/advisories/GHSA-c287-v325-j5jx (vendor-advisory)
- www.vulncheck.com/advisories/arcadedb-gremlin-wire-protocol-authorization-bypas… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-75853?
- CVE-2026-75853 is a high-severity vulnerability in Arcadedata Arcadedb, classified under Missing Authorization. CVSS score: 8.8/10. Published 2026-08-18.
- How severe is CVE-2026-75853?
- High severity. CVSS v3 base score is 8.8 out of 10.