ArcadeDB 26.4.2 before 26.8.1 Authorization Bypass via set_server_setting
Published Aug 18, 2026
5.3
MEDIUMCVSS 4.0
EPSS 0.29%
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.
Affected products
-
- Version 26.4.2StatusaffectedConstraints<26.8.1
- Version 26.8.1StatusunaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ArcadeData | Arcadedb | unaffected |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
1 other source (NVD) ▾
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Aug 18, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
Aug–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.29% (0.00287) | 19.27th | v5 (v2026.06.15) |
| Aug 19, 2026 | 0.21% (0.00209) | 11.37th | v5 (v2026.06.15) |
References (2)
- https://github.com/ArcadeData/arcadedb/security/advisories/GHSA-pff6-hp53-pj54 exploitvendor-advisory
- https://www.vulncheck.com/advisories/arcadedb-before-authorization-bypass-via-set-server-setting third-party-advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/ArcadeData/arcadedb/security/advisories/GHSA-pff6-hp53-pj54 | exploitvendor-advisory | |
| https://www.vulncheck.com/advisories/arcadedb-before-authorization-bypass-via-set-server-setting | third-party-advisory |
Change history (0)
No recorded changes yet.