registry / Remote code execution / twzrd-x402-gate / 0.11.1

twzrd-x402-gate@0.11.1

Security fixes: payment-verdict integrity issues fixed through 0.11.4 (see the 0.11.2, 0.11.3 and 0.11.4 changelogs). Upgrade to twzrd-x402-gate@0.11.4.

Released identity 0.11.1. Buyer-side x402 trust gate: free preflight before signing USDC to a merchant. On Solana mainnet and Base mainnet (eip155:8453), a missing payTo is not approved, a buyer preflight outage does not sign unless TWZRD_FAIL_OPEN=true,

AI Security Review

scanned 5d ago · by lpm-firewall-ai

This is not evidence of malicious behavior, but the documented time-of-check/time-of-use gap is a material payment security weakness in the safe-fetch flow. The source labels it advisory and points users to challenge-bound alternatives, so the finding warrants a warning rather than a block.

Static reason

One or more suspicious static signals were detected.; previous stored version diff introduced dangerous source

Trigger

A user runs twzrd-safe-fetch against a URL that returns HTTP 402 and the preflight approves payment.

Impact

The recipient, network, asset or amount paid may differ from what the gate checked.

Mechanism

The CLI preflights the first payment challenge, then invokes AgentCash, which makes a second request and may sign a changed challenge without another gate check.

AI rationale

Evidence

dist/safe-fetch.js

Network endpoints2

intel.twzrd.xyzuser-supplied target URL

Decision evidence

public snapshot

AI called this Suspicious at 98.0% confidence as Critical Vulnerability with medium false-positive risk.

Evidence for warning

The safe-fetch CLI is explicitly documented as an advisory precheck: it checks one HTTP 402 challenge, then AgentCash makes a separate request and may sign a different challenge without rechecking.
The payer is invoked with the requested URL, method, body, headers and payment network after the gate allows payment.

Evidence against

There is no preinstall, install or postinstall script; prepublishOnly runs release verification.
The package identifies safer challenge-bound integration paths and warns against treating safe-fetch as a secure firewall.
The flagged shell execution is part of the explicitly invoked safe-fetch CLI and runs AgentCash as its payer.

Behavioral surface

Source

ChildProcessCryptoDynamicRequireEnvironmentVarsFilesystemNetwork

Supply chain

HighEntropyStringsUrlStrings

ManifestNo manifest risk signals triggered.

Source & flagged code

5 flagged

bin/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 · L5

bin/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 · L28

bin/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@0.11.1.

See all versions of twzrd-x402-gate for other recorded verdicts.

Review the evidence and your use of twzrd-x402-gate@0.11.1 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: 2026-10-31 01:23:53.596Z (UTC).

Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.

registry / Remote code execution / twzrd-x402-gate / 0.11.1

twzrd-x402-gate@0.11.1

Security fixes: payment-verdict integrity issues fixed through 0.11.4 (see the 0.11.2, 0.11.3 and 0.11.4 changelogs). Upgrade to twzrd-x402-gate@0.11.4.

AI Security Review

scanned 5d ago · by lpm-firewall-ai

Static reason

One or more suspicious static signals were detected.; previous stored version diff introduced dangerous source

Trigger

A user runs twzrd-safe-fetch against a URL that returns HTTP 402 and the preflight approves payment.

Impact

The recipient, network, asset or amount paid may differ from what the gate checked.

Mechanism

The CLI preflights the first payment challenge, then invokes AgentCash, which makes a second request and may sign a changed challenge without another gate check.

AI rationale

Evidence

dist/safe-fetch.js

Network endpoints2

intel.twzrd.xyzuser-supplied target URL

Decision evidence

public snapshot

AI called this Suspicious at 98.0% confidence as Critical Vulnerability with medium false-positive risk.

Evidence for warning

The safe-fetch CLI is explicitly documented as an advisory precheck: it checks one HTTP 402 challenge, then AgentCash makes a separate request and may sign a different challenge without rechecking.
The payer is invoked with the requested URL, method, body, headers and payment network after the gate allows payment.

Evidence against

There is no preinstall, install or postinstall script; prepublishOnly runs release verification.
The package identifies safer challenge-bound integration paths and warns against treating safe-fetch as a secure firewall.
The flagged shell execution is part of the explicitly invoked safe-fetch CLI and runs AgentCash as its payer.

Behavioral surface

Source

ChildProcessCryptoDynamicRequireEnvironmentVarsFilesystemNetwork

Supply chain

HighEntropyStringsUrlStrings

ManifestNo manifest risk signals triggered.

Source & flagged code

5 flagged

bin/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 · L5

bin/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 · L28

bin/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@0.11.1.

See all versions of twzrd-x402-gate for other recorded verdicts.

Review the evidence and your use of twzrd-x402-gate@0.11.1 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: 2026-10-31 01:23:53.596Z (UTC).

Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.

AI Security Review

Decision evidence

Source & flagged code

Findings

Affected versions and remediation

AI Security Review

Decision evidence

Source & flagged code

Findings

Affected versions and remediation

Runtime surface

Behavioral surface