GHSA-pqh8-p93p-2rx7: @dynatrace-oss/dynatrace-mcp-server has a DQL injection via parameters not documented as DQL

Summary A DQL injection vulnerability in several read tools lets a caller bypass the tools' documented field-scope, time-window, and display caps by injecting DQL pipeline stages through parameters typed as identifiers. Details Several tools interpolate caller-supplied parameters directly into DQL query strings without quoting or escaping. The affected parameters are documented in their Zod schemas as identifiers or constrained shorthand (such as "24h" timeframe values or Kubernetes UIDs) - not as DQL expressions. The interpolation lets a caller break out of string literals, append arbitrary DQL pipeline stages, and use // line comments (documented in the Dynatrace DQL language reference) to discard the rest of the intended query. The marginal-privilege ceiling is low because the operator's token also exposes execute_dql with full DQL access. What the injection grants is the ability to bypass the affected tools' contract: the readOnlyHint: true annotation that MCP clients may treat as a signal to auto-approve, the per-tool field selection (e.g., | fields id, name, type), the display caps (maxProblemsToDisplay, maxVulnerabilitiesToDisplay, maxEntitiesToDisplay), and the time-window bounds. The vulnerable interpolations are: | File | Line | Parameter | Interpolation | |------|------|-----------|---------------| | src/capabilities/find-monitored-entity-by-name.ts | 23 | entityNames[] | fetch ${entityType} \| search "*${entityNames.join('*" OR "*')}*" \| fieldsAdd entity.type \| expand tags | | src/capabilities/find-monitored-entity-by-name.ts | 41 | entityNames[] | smartscapeNodes "*" \| search "*${entityNames.join('*" OR "*')}*" \| fields id, name, type | | src/capabilities/list-problems.ts | 27 | timeframe | fetch dt.davis.problems, from: now()-${timeframe}, to: now() | | src/capabilities/list-vulnerabilities.ts | 19 | timeframe | fetch security.events, from: now()-${timeframe}, to: now() | | src/capabilities/list-exceptions.ts | 11 | timeframe | fetch user.event