postboi@0.35.0
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AI Security Review
scanned 3mo ago · by lpm-firewall-aiNo concrete malicious or unconsented package-install attack was found. The explicit setup path creates a persistent first-party agent extension and later lifecycle behavior, so warn rather than block.
Static reason
High-risk behavior combination matched malicious policy.
Trigger
User runs postboi init, then a later install executes the added prepare hook.
Impact
Persistent project configuration and agent-skill updates; credential synchronization is available to an authenticated Postboi account.
Mechanism
explicit CLI setup creates a lifecycle hook and first-party agent skill
AI rationale
No concrete malicious or unconsented package-install attack was found. The explicit setup path creates a persistent first-party agent extension and later lifecycle behavior, so warn rather than block.
Evidence
package.jsondist/cli.js.claude/skills/postboi/SKILL.md.env.env.local.gitignore
Network endpoints1
postboi.app/v1/env
Decision evidence
public snapshotAI called this Suspicious at 88.0% confidence as Dangerous Capability with medium false-positive risk.
Evidence for warning
- Explicit init can add a prepare hook that runs postboi sync on later installs.
- Sync refreshes an existing .claude skill without another confirmation.
- The env push command uploads selected provider credentials to the Postboi API.
Evidence against
- Package's own prepare hook only runs svelte-kit sync.
- CLI dispatch requires explicit init, skill, sync, or env commands.
- Initial agent-skill installation is confirmation-gated.
- No unconsented install-time credential upload or foreign agent-config mutation found.
Behavioral surface
ChildProcessCryptoDynamicRequireEnvironmentVarsFilesystemNetworkShell
HighEntropyStringsMinifiedUrlStrings
Source & flagged code
6 flaggeddist/cli.jsView file
108const { pathToFileURL } = await import("node:url");
L109: let dir = process.cwd();
L110: for (;; ) {
...
L245: if (this.#hooks.before?.send) {
L246: return this.#hooks.before.send({
L247: provider: this.provider,
...
L294: async send_request(url, init) {
L295: return fetch(url, init);
L296: }
...
L358: async read_json(response) {
L359: const text = await response.text();
L360: if (!text)
Critical
Credential Exfiltration
Source appears to send environment or credential material to an external endpoint.
dist/cli.jsView on unpkg · L108108const { pathToFileURL } = await import("node:url");
L109: let dir = process.cwd();
L110: for (;; ) {
...
L245: if (this.#hooks.before?.send) {
L246: return this.#hooks.before.send({
L247: provider: this.provider,
...
L294: async send_request(url, init) {
L295: return fetch(url, init);
L296: }
...
L358: async read_json(response) {
L359: const text = await response.text();
L360: if (!text)
Critical
Browser Credential Phishing
Source appears to collect browser login credentials for exfiltration.
dist/cli.jsView on unpkg · L108785import { readdirSync as readdirSync2, readFileSync as readFileSync4, writeFileSync as writeFileSync4, existsSync as existsSync3, appendFileSync } from "node:fs";
L786: import { spawnSync } from "node:child_process";
L787: import { join as join5, delimiter } from "node:path";
Findings
2 Critical3 High4 Medium5 Low
CriticalCredential Exfiltrationdist/cli.js
CriticalBrowser Credential Phishingdist/cli.js
HighChild Processdist/cli.js
HighShelldist/cli.js
HighCommand Output Exfiltrationdist/cli.js
MediumDynamic Requiredist/workers_env.js
MediumNetwork
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowNon Install Lifecycle Scripts
LowScripts Present
LowFilesystem
LowHigh Entropy Strings
LowUrl Strings
Affected versions and remediation
This report applies to postboi@0.35.0.
See all versions of postboi for other recorded verdicts.
- Review the evidence and your use of postboi@0.35.0 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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