@mastra/code-sdk@1.4.0
Mastra Code SDK: the agent core behind Mastra Code (everything except the TUI) — build your own UIs and surfaces on top of it
AI Security Review
scanned 1mo ago · by lpm-firewall-aiSource inspection establishes conditional forwarding of existing service credentials to an unrestricted configured gateway. No separate concrete malicious behavior was established, so a warning is appropriate.
Static reason
One or more suspicious static signals were detected.; previous stored version diff introduced dangerous source
Trigger
Run an agent with stored OpenAI OAuth credentials, a gateway key, and a gateway-prefixed OpenAI model selected.
Impact
A configured gateway operator can receive a credential intended for OpenAI.
Mechanism
Model resolution accepts a configured gateway URL, disables Codex endpoint rewriting, and attaches the stored OAuth bearer to the outgoing request.
AI rationale
Source inspection establishes conditional forwarding of existing service credentials to an unrestricted configured gateway. No separate concrete malicious behavior was established, so a warning is appropriate.
Evidence
dist/auth/storage.jsdist/providers/openai-codex.jsdist/agents/model.jsdist/agents/mastracode-gateway.jsdist/index.jsauth.json
Network endpoints1
gateway-api.mastra.ai
Decision evidence
public snapshotAI called this Suspicious at 97.0% confidence as Dangerous Capability with medium false-positive risk.
Evidence for warning
- OAuth credentials are loaded from the application's auth.json storage.
- The Codex request wrapper reads the stored OpenAI OAuth access token and inserts it into the authorization header.
- Gateway destinations come from settings or MASTRA_GATEWAY_URL without a destination allowlist; routing requires a gateway key and gateway model selection.
- The gateway model caller disables Codex URL rewriting and sends authenticated requests to the configured gateway.
- The exported agent factory connects model requests to this dynamic model resolution path.
Evidence against
- package.json has no automatic install lifecycle hooks or runtime self-dependency.
- Gateway routing is conditional on configuration and model selection; no covert default credential export was established.
- The inspected browser authentication configuration targets the intended Codex service.
Behavioral surface
ChildProcessCryptoDynamicRequireEnvironmentVarsFilesystemNetwork
Source & flagged code
4 flaggeddist/plugins/loader.jsView file
115url.searchParams.set("size", stat.size.toString());
L116: const mod = await import(url.href);
L117: return validatePluginExport(mod.default ?? mod.plugin);
Medium
Dynamic Require
Package source references dynamic require/import behavior.
dist/plugins/loader.jsView on unpkg · L115dist/index.jsView file
164return {
L165: accessToken: process.env.MASTRA_CLOUD_ACCESS_TOKEN,
L166: projectId: process.env.MASTRA_PROJECT_ID
...
L203: async function createMastraCodeAgentController(config) {
L204: const cwd = config?.cwd ?? process.cwd();
L205: const homeDir = config?.homeDir ?? config?.initialState?.homeDir;
...
L239: const mastraCodeGateway = createMastraCodeGateway({
L240: mastraGatewayBaseUrl: (process.env["MASTRA_GATEWAY_URL"] ?? storedGatewayUrl ?? "https://gateway-api.mastra.ai").replace(/\/+$/, "").replace(/\/v1$/, ""),
L241: mastraGatewayApiKey: mgApiKey,
...
L252: const sessionId = `mastracode-session-${shortHash(project.resourceId)}`;
L253: const ownerId = `mastracode-${shortHash(`${hostname()}\0${project.rootPath}`)}`;
L254: const configuredPubSub = config?.pubsub;
High
Sandbox Evasion Gated Capability
Source gates dangerous network, credential, or execution behavior behind CI, host, platform, time, or geo fingerprint checks.
Findings
2 High5 Medium5 Low
HighSandbox Evasion Gated Capabilitydist/index.js
HighPrevious Version Dangerous Deltadist/onboarding/settings.js
MediumDynamic Requiredist/plugins/loader.js
MediumNetwork
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
MediumAi Review Evidencedist/auth/storage.js
LowScripts Present
LowFilesystem
LowHigh Entropy Strings
LowTelemetry
LowUrl Strings
Affected versions and remediation
This report applies to @mastra/code-sdk@1.4.0.
See all versions of @mastra/code-sdk for other recorded verdicts.
- Review the evidence and your use of @mastra/code-sdk@1.4.0 before allowing it. Restrict the permissions described in this report.
- Choose an independently verified alternative or release. This report does not establish that other versions are safe.
Evidence last updated: .
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