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CVE-2026-123811

7.5 highEPSS 0.2%Fix available

High (7.5) in dynatrace-oss dynatrace-mcp. EPSS 0.2% estimated probability of exploitation activity in the next 30 days. Fixed in @dynatrace-oss/dynatrace-mcp-server 2.0.0.

On this page
Dynatrace MCP Server is an MCP server for Dynatrace Observability. Prior to 2.0.0, a server started with the --http option accepts JSON-RPC tools/call requests without authentication, session validation, or Host and Origin protections before dispatching them under the server's configured Dynatrace credentials. A network-reachable caller can invoke execute_dql to read logs, security events, user sessions, and other Grail data, or invoke create_dynatrace_notebook to create tenant-visible notebooks. The send_event path is not affected because its requestHumanApproval gate blocks this attack path, and reset_grail_budget only demonstrates dispatch without accessing Dynatrace data. This issue is fixed in version 2.0.0.

Severity

CVSS 3.1

7.5 high
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:L
EPSS
0.2% estimated probability of exploitation activity in the next 30 days; 15th percentile. Scored 2026-11-10. A forecast for this CVE across the internet, not for your own systems.
CWE
CWE-306 Missing Authentication for Critical Functionality
OWASP Top 10
A07:2025 Authentication Failures
Published
Assigned by
GitHub_M (CNA)
NVD analysis
Not in the NVD yet
Record from
the CVE List, synced

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Affected

Versions

From the CNA's record in the CVE List.

ProductAffected
dynatrace-oss dynatrace-mcp< 2.0.0

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-p7w7-4929-vpj5npm@dynatrace-oss/dynatrace-mcp-server<2.0.02.0.0

Attack patterns (CAPEC)

  • CAPEC-12 Choosing Message Identifier Likelihood: High · Severity: High
  • CAPEC-36 Using Unpublished Interfaces or Functionality Likelihood: Medium · Severity: High
  • CAPEC-62 Cross Site Request Forgery Likelihood: High · Severity: Very High
  • CAPEC-166 Force the System to Reset Values Severity: Medium
  • CAPEC-216 Communication Channel Manipulation

The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.

References

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