Privilege escalation in Arcadedata Arcadedb
CVE-2026-75845
ArcadeDB versions 26.4.2 through 26.7.3 contain an authorization bypass vulnerability in the set_server_setting MCP server-level tool. SetServerSettingTool.execute() gates only on the global allowAdmin flag and never checks the caller's role, so in an MCP deployment with allowAdmin=true and a non-root allowedUsers set, any authenticated read-only user can invoke set_server_setting to modify server GlobalConfiguration, enabling configuration tampering or denial of service. The issue is fixed in 26.8.1.
Vulnerability class: Privilege Escalation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.003 (19.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 19.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
Weakness classification (CWE)
References
- github.com/ArcadeData/arcadedb/security/advisories/GHSA-pff6-hp53-pj54 (vendor-advisory)
- www.vulncheck.com/advisories/arcadedb-before-authorization-bypass-via-set-serve… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-75845?
- CVE-2026-75845 is a medium-severity vulnerability in Arcadedata Arcadedb, classified under Improper Privilege Management. CVSS score: 6.3/10. Published 2026-08-18.
- How severe is CVE-2026-75845?
- Medium severity. CVSS v3 base score is 6.3 out of 10.