registry / twzrd-x402-gate / 0.13.0
twzrd-x402-gate@0.13.0
Buyer-side x402 trust gate: free preflight before signing USDC on Solana + Base mainnet (eip155:8453). By default no signing if preflight is down; TWZRD_FAIL_OPEN overrides. Other EVM: unscored.
AI Security Review
scanned 5d ago · by lpm-firewall-aiThe source does not establish malicious behavior, but it documents a material flaw in the safe-fetch protection: the challenge checked by TWZRD may differ from the one AgentCash signs. Treat this as suspicious because the payment can proceed without the gate validating the actual signed requirement.
Static reason
One or more suspicious static signals were detected.; previous stored version diff introduced dangerous source
Trigger
A user invokes safe-fetch for a URL without dry-run, and the preflight approves the initial challenge.
Impact
The payment recipient, network, asset, or amount could differ from the preflight decision, undermining the gate's buyer protection.
Mechanism
The tool probes the URL and checks challenge A, then launches AgentCash for a second request; AgentCash may receive and sign challenge B without another TWZRD check.
AI rationale
The source does not establish malicious behavior, but it documents a material flaw in the safe-fetch protection: the challenge checked by TWZRD may differ from the one AgentCash signs. Treat this as suspicious because the payment can proceed without the gate validating the actual signed requirement.
Evidence
dist/safe-fetch.js
Network endpoints1
intel.twzrd.xyz
Decision evidence
public snapshotAI called this Suspicious at 96.0% confidence as Critical Vulnerability with medium false-positive risk.
Evidence for warning
- The safe-fetch CLI preflights the first payment challenge, then delegates payment to AgentCash, which makes a separate request.
- The source explicitly warns that AgentCash may receive a different challenge and sign it without another TWZRD check.
- The payer path runs `npx` with `agentcash@latest`, passing the requested URL and the current environment.
Evidence against
- The package describes its purpose as a buyer-side x402 preflight before signing.
- The manifest has only a `prepublishOnly` lifecycle script, not an install hook.
- The source labels safe-fetch an advisory precheck and documents the challenge mismatch risk.
Behavioral surface
ChildProcessCryptoDynamicRequireEnvironmentVarsFilesystemNetwork
HighEntropyStringsUrlStrings
Source & flagged code
5 flaggedbin/twzrd-safe-fetch.jsView file
5*/
L6: import { spawnSync } from "node:child_process";
L7: import { existsSync } from "node:fs";
High
Child Process
Package source references child process execution.
bin/twzrd-safe-fetch.jsView on unpkg · L5bin/twzrd-gate-eval-refuse.jsView file
28const pkgRoot = join(__dirname, "..");
L29: const require = createRequire(import.meta.url);
L30:
Medium
Dynamic Require
Package source references dynamic require/import behavior.
bin/twzrd-gate-eval-refuse.jsView on unpkg · L28bin/twzrd-gate-doctor.jsView file
33// tsx resolves `src` by absolute path, so the user's cwd is safe to keep.
L34: const r = spawnSync("npx", ["--yes", "tsx", src, ...process.argv.slice(2)], {
L35: stdio: "inherit",
Findings
1 Critical3 High4 Medium5 Low
CriticalPrevious Version Dangerous Deltadist/safe-fetch.js
HighChild Processbin/twzrd-safe-fetch.js
HighRuntime Package Installbin/twzrd-gate-doctor.js
HighSemantic Analysis Limiteddist/evidence-verify.js#virtual:normalized:round1
MediumDynamic Requirebin/twzrd-gate-eval-refuse.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 twzrd-x402-gate@0.13.0.
See all versions of twzrd-x402-gate for other recorded verdicts.
- Review the evidence and your use of twzrd-x402-gate@0.13.0 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: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.