@tonbo/yield@0.3.20
Tonbo Yield: capture your agents' sessions on every machine and list them from any.
AI Security Review
scanned 1d ago · by lpm-firewall-aiThe source automatically sends runtime usage telemetry with session and handoff identifiers, and the package provides only an environment-variable opt-out without an in-package disclosure. The credential-looking strings are fake redaction-test data, and I found no credential redirection or install-time attack.
Static reason
One or more suspicious static signals were detected.
Trigger
Automatically on the first captured turn when a handoff marker is present and an API origin is configured.
Impact
Tonbo can associate handoff timing with session and handoff identifiers; no credentials or session contents were identified in this metric.
Mechanism
The capture hook records the timing metric and sends it to the recordYieldMetric API operation. Telemetry is on by default and has an environment-variable opt-out.
AI rationale
The source automatically sends runtime usage telemetry with session and handoff identifiers, and the package provides only an environment-variable opt-out without an in-package disclosure. The credential-looking strings are fake redaction-test data, and I found no credential redirection or install-time attack.
Evidence
dist/bin/yield.js
Network endpoints1
api.tonbo.dev
Decision evidence
public snapshotAI called this Suspicious at 82.0% confidence as Dangerous Capability with medium false-positive risk.
Evidence for warning
- On the first turn after a handoff, the capture hook automatically records a timing metric and includes the session ID and handoff ID.
- Metrics are enabled by default; they can be disabled with TONBO_YIELD_METRICS=off.
- The metric is POSTed to /yield/metrics through the API, whose default host is api.tonbo.dev.
- The manifest describes a session-capture CLI and declares no install lifecycle hook.
- The apparent OpenAI and Anthropic secret strings occur in a redaction test fixture that explicitly says its secrets are fake.
Evidence against
- The metric contains a timing value and service-generated identifiers, not session contents or credential values.
- The package’s stated purpose is capturing and listing agent sessions.
- No install-time behavior was identified.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
HighEntropyStringsUrlStrings
Source & flagged code
5 flaggeddist/bin/yield.jsView file
3790patternName = github_pat
severity = critical
line = 3790
Critical
Critical Secret
Package contains a critical-looking secret pattern.
dist/bin/yield.jsView on unpkg · L37903790patternName = github_pat
severity = critical
line = 3790
Critical
Secret Pattern
GitHub personal access token in dist/bin/yield.js
dist/bin/yield.jsView on unpkg · L3790•Manifest-reachable source captures an API credential, sends it to a fixed unofficial gateway, and persists that redirection in agent or shell configuration.
dist/bin/yield.js:
import { mkdir as mkdir15, readFile as readFile22, stat as stat10, writeFile as writeFile6 } from "node:fs/promises";
import { createInterface as createInterface2 } from "node:readline/promises";
await handle.writeFile(`${JSON.stringify(login, null, 2)}
const authorization = new URL("/cli/login", this.loginOrigin);
authorization.search = new URLSearchParams({
return authorization.toString();
step: "device-authorization",
progress2({ status: "started", step: "device-authorization" });
High
Credential Redirect Persistence
Manifest-reachable source sends a prompted API credential to a fixed unofficial gateway and persists the redirection.
Findings
2 Critical2 High4 Medium4 Low
CriticalCritical Secretdist/bin/yield.js
CriticalSecret Patterndist/bin/yield.js
HighCredential Redirect Persistencedist/bin/yield.js
HighSandbox Evasion Gated Capabilitydist/bin/yield.js
MediumNetwork
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
MediumAi Review Evidencedist/bin/yield.js
LowScripts Present
LowFilesystem
LowHigh Entropy Strings
LowUrl Strings
Affected versions and remediation
This report applies to @tonbo/yield@0.3.20.
See all versions of @tonbo/yield for other recorded verdicts.
- Review the evidence and your use of @tonbo/yield@0.3.20 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: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.