CVE-2026-123811

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Source
https://cve.org/CVERecord?id=CVE-2026-123811
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-123811.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-123811
Aliases
Published
2026-11-09T21:01:42Z
Modified
2026-11-10T10:46:29Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:L CVSS Calculator
Summary
Dynatrace MCP Server: Unauthenticated HTTP MCP Tool Invocation in `@dynatrace-oss/dynatrace-mcp-server`
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-306"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/123xxx/CVE-2026-123811.json"
}
References

Affected packages

Git / github.com/dynatrace-oss/dynatrace-mcp

Affected ranges

Type
GIT
Repo
https://github.com/dynatrace-oss/dynatrace-mcp
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
64dfcb1095823d0fb43013635446288a6ff60e29
Fixed
8f12972481e9165e8bd24d63b0a9e71976f85a43
Fixed
ac5251edfcf9511c6c662414da743383e7d1451c
Fixed
ead820322238633f5b289778c57faf5d3a8d73f9
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "2.0.0"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "fixed": "8f12972481e9165e8bd24d63b0a9e71976f85a43"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "ac5251edfcf9511c6c662414da743383e7d1451c"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "ead820322238633f5b289778c57faf5d3a8d73f9"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "v2.0.0",
            "range": [
                {
                    "fixed": "64dfcb1095823d0fb43013635446288a6ff60e29"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

v0.*
v0.1.1
v0.1.2
v0.1.3
v0.1.4
v0.10.0
v0.11.0
v0.12.0
v0.13.0
v0.2.0
v0.3.0
v0.4.0
v0.5.0
v0.5.0-rc.1
v0.5.0-rc.2
v0.5.0-rc.3
v0.5.0-rc.4
v0.6.0
v0.6.0-rc.1
v0.6.0-rc.2
v0.6.1
v0.7.0
v0.8.0
v0.9.0
v0.9.1
v0.9.2
v1.*
v1.0.0
v1.0.0-rc.1
v1.0.1
v1.1.0
v1.2.0
v1.3.0
v1.3.1
v1.4.0
v1.5.0
v1.5.0-beta.3
v1.5.1
v1.5.2
v1.5.3
v1.6.0
v1.6.1
v1.7.0
v1.7.1
v1.7.2
v1.7.3
v1.7.4
v1.7.5
v1.7.6
v1.8.0
v1.8.1
v1.8.2
v1.8.3
v1.8.4
v1.8.5
v1.8.6
v1.8.7

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-123811.json"