EUVD-2026-51987
GHSA-7qj8-rw8h-hhxv
Severity by source
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/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
Network-reachable MCP tool requires low-privilege authentication (PR:L); AC:H because HA cluster token must be configured; full C/I/A from root impersonation; no scope change as impact stays within the ArcadeDB server.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/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
Lifecycle Timeline
3DescriptionCVE.org
ArcadeDB versions before 26.7.3 contain an information disclosure vulnerability in the MCP get_server_settings tool that leaks the arcadedb.ha.clusterToken in cleartext. Attackers with MCP access can retrieve the cluster token and use it with X-ArcadeDB-Cluster-Token and X-ArcadeDB-Forwarded-User headers to impersonate root and achieve full server compromise.
AnalysisAI
Cleartext leakage of the HA cluster token in ArcadeDB's MCP get_server_settings tool allows any authenticated MCP user to escalate to full root-level server control in all versions before 26.7.3. The exposed arcadedb.ha.clusterToken can be replayed via the X-ArcadeDB-Cluster-Token and X-ArcadeDB-Forwarded-User HTTP headers to impersonate the root user, turning a low-privilege information disclosure into a complete server compromise. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires authenticated MCP access to the ArcadeDB instance - the attacker must hold valid credentials permitting invocation of the get_server_settings MCP tool (PR:L confirmed by CVSS 4.0 vector). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N) correctly captures the duality of this vulnerability: the impact metrics are maximal (full confidentiality, integrity, and availability compromise of the vulnerable system), but the attack complexity is high and specific prerequisites apply. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker holding a low-privilege ArcadeDB MCP account calls the get_server_settings tool and parses the response to extract the arcadedb.ha.clusterToken value returned in cleartext. The attacker then issues HTTP requests to the ArcadeDB server with the X-ArcadeDB-Cluster-Token header set to the stolen token and X-ArcadeDB-Forwarded-User set to 'root,' causing the server to treat the request as originating from the root administrator. … |
| Remediation | Upgrade to ArcadeDB 26.7.3 or later, which resolves the cleartext token exposure in the MCP get_server_settings tool per the vendor advisory at https://github.com/ArcadeData/arcadedb/security/advisories/GHSA-p9wc-4fhr-78wm. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: identify all ArcadeDB instances and document current versions in your environment. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
OS command execution in ArcadeDB (arcadedb-engine) before 26.7.2 lets an authenticated user with UPDATE_SCHEMA permissio
Scripting authorization bypass in ArcadeDB before 26.7.2 lets any authenticated database user - including read-only role
Cross-database authorization bypass (IDOR) in ArcadeDB before 26.7.2 lets attackers read and write any database on the s
Privilege escalation in ArcadeDB before 26.7.3 allows any user holding UPDATE_SCHEMA permission to create server-wide ad
Cluster token exposure in ArcadeDB before 26.7.2 enables any authenticated user to escalate privileges to root-level adm
Permission bypass in ArcadeDB before 26.7.2 allows authenticated read-only users to execute privileged schema-mutation S
Privilege escalation in ArcadeDB before 26.7.3 allows any authenticated MCP user to fully bypass the database authorizat
Same weakness CWE-200 – Information Exposure
View allSame technique Information Disclosure
View allShare
External POC / Exploit Code
Leaving vuln.today