Medium severity · published Aug 18, 2026
CVE-2026-75845
ArcadeDB 26.4.2 before 26.8.1 Authorization Bypass via set_server_setting
6.3
CVSS
0.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AR
arcadedb · ArcadeData
26.4.2 before 26.8.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-75845
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-75845
github.com
https://github.com/ArcadeData/arcadedb/security/advisories/GHSA-pff6-hp53-pj54
www.vulncheck.com
https://www.vulncheck.com/advisories/arcadedb-before-authorization-bypass-via-set-server-setting
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