Back to the CVE list
CVE-2026-123811

Dynatrace MCP Server: Unauthenticated HTTP MCP Tool Invocation in `@dynatrace-oss/dynatrace-mcp-server`

CVSS score

7.5

EPSS probability

—

Risk score

0.8

Published

16 h ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

Impact on My Inventory

Only the personal products you have added to your account are assessed; an organisation's inventory does not appear here.

Checking session…

Vulnerability description

DayBreach AI Explanation

Verified against sources

Dynatrace MCP Server Unauthenticated HTTP MCP Tool Invocation Vulnerability

Sources read

2

Source agreement

Tam uyum

Evidence confidence

%63

Short explanation

A vulnerability exists in Dynatrace MCP Server where instances started with the --http option accept JSON-RPC tool call requests without authentication, session validation, or Host and Origin protections.

Why does it matter?

Network-reachable attackers can leverage the server's configured Dynatrace credentials to read sensitive Grail data or create tenant-visible notebooks.

What should be done?

  • Upgrade to version 2.0.0 or later
  • Follow the vendor advisory guidance
Chain of evidence and sources2 verified claims

Dynatrace MCP Server 2.0.0 öncesi sürümlerde --http seçeneği ile başlatılan sunucular, kimlik doğrulama veya oturum doğrulaması olmadan JSON-RPC araç çağrılarını kabul eder.

S0 · daybreach-canonicalS1 · cvelistS2 · github

Bu açık, saldırganların execute_dql aracılığıyla loglar ve güvenlik olayları gibi hassas Grail verilerini okumasına olanak tanır.

S0 · daybreach-canonicalS2 · github
Show the technical text from the sources

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.

CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:L

CWE: CWE-306

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-123811 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1dynatrace-ossdynatrace-mcp View
2npm@dynatrace-oss/dynatrace-mcp-server View
Total affected vendors: 2|Products: 2

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
7.5CVSS V3_1HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:LCVE CNA
7.5CVSS 3.x—Vector not publishedGitHub Advisory
0.0CVSS 4.0—Vector not publishedGitHub Advisory

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-123811 is associated with the following CWEs:

CWE-306: Common Weakness Enumeration Entry CWE-306

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-123811 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsGerekmiyor
UserGerekiyor

Official Sources and Advisories

https://github.com/dynatrace-oss/dynatrace-mcp/security/advisories/GHSA-p7w7-4929-vpj5vendor-advisoryhttps://github.com/dynatrace-oss/dynatrace-mcp/commit/8f12972481e9165e8bd24d63b0a9e71976f85a43vendor-advisoryhttps://github.com/dynatrace-oss/dynatrace-mcp/commit/ac5251edfcf9511c6c662414da743383e7d1451cvendor-advisoryhttps://github.com/dynatrace-oss/dynatrace-mcp/commit/ead820322238633f5b289778c57faf5d3a8d73f9vendor-advisoryhttps://github.com/dynatrace-oss/dynatrace-mcp/releases/tag/v2.0.0vendor-advisoryhttps://github.com/dynatrace-oss/dynatrace-mcp/pull/536vendor-advisoryhttps://github.com/advisories/GHSA-p7w7-4929-vpj5vendor-advisory

CVSS Vector Radar Chart

7.5 / 10
Attack VectorNetworkComplexityHighPrivilegesNoneUser Interact.RequiredConfidentialityHighIntegrityLowAvailabilityLow

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:L
Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredNone required
User Interaction—
Confidentiality (Gizlilik)High
Integrity (Bütünlük)Low
Availability (Erişilebilirlik)Low

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

D
dynatrace-oss logo
dynatrace-oss
N
npm logo
npm

Weakness Type (CWE & CAPEC)

CWE-306

Similar Vulnerabilities

Get this vulnerability through the API

Affected products, version ranges, exploitation status and patch information in a single request, with a free key.

Get a free keyDocumentation
curl -H "x-api-key: $DAYBREACH_API_KEY" \
  "https://api.daybreach.dev/api/v1/intel/cves/CVE-2026-123811"
CVE-2026-123811 · Dynatrace MCP Server: Unauthenticated HTTP…