registry / Credential exfiltration / flavor-code / 1.3.19

flavor-code@1.3.19

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AI Security Review

scanned 2mo ago · by lpm-firewall-ai

The package does not show malicious installation behavior, covert network exfiltration, or reviewer manipulation. However, automatic persistence of API and OAuth credentials during ordinary runtime use is a material security weakness that warrants a warning.

Static reason

One or more suspicious static signals were detected.; source matched previously finalized malicious package; routed for review; previous stored version diff introduced dangerous source

Trigger

Run Flavor in a process that has one of the listed provider or OAuth environment values.

Impact

Credentials can remain on disk after the invoking process exits, increasing local disclosure risk.

Mechanism

Automatic persistence of environment credentials during configuration loading.

AI rationale

Evidence

dist/chunk-HJOCNKPN.jspackage.json~/.flavor-code/.env~/.flavor-code/flavor.json.env.flavor/flavor.json

Decision evidence

public snapshot

AI called this Suspicious at 86.0% confidence as Critical Vulnerability with low false-positive risk.

Evidence for warning

Runtime configuration automatically copies configured OpenAI, Anthropic, and OAuth environment values into a persistent home-directory .env file.
The write occurs during normal configuration loading, without a dedicated export or confirmation action.

Evidence against

package.json has no preinstall, install, or postinstall lifecycle hook.
Project initialization and self-update are explicit CLI subcommands.
No source evidence shows credentials sent to an attacker-controlled endpoint or a hidden remote payload.

Behavioral surface

Source

ChildProcessCryptoDynamicRequireEnvironmentVarsEvalFilesystemNetworkShell

Supply chain

HighEntropyStringsMinifiedPossibleObfuscationUrlStrings

Manifest

NoLicense

scanned 122 file(s), 5.79 MB of source, external domains: 127.0.0.1, 192.168.1.100, api.example.com, developer.mozilla.org, example.com, github.com, json-schema.org, lite.duckduckgo.com, mcp.example.com, react.dev, registry.npmjs.org, www.bing.com, www.w3.org

Source & flagged code

19 flagged

dist/cli-main.jsView file

Lines 34-74javascript

34 loadConfig,

35 readRecoverableFile,

36 setProjectSkillDisabled,

37 updateProtectedFile

38} from "./chunk-HJOCNKPN.js";

39import {

40 gt,

41 isValidVersion

42} from "./chunk-OTYFL4AG.js";

43import "./chunk-RQTYHUMK.js";

44import "./chunk-S32JRDZK.js";

46// src/cli.tsx

47import { randomUUID as randomUUID2 } from "crypto";

48import { realpathSync } from "fs";

49import { homedir as homedir3 } from "os";

50import { posix, resolve as resolve3 } from "path";

51import { fileURLToPath } from "url";

52import { Command, Option } from "commander";

54// src/update/apply.ts

55import { spawn } from "child_process";

56function npmExecutable(platform = process.platform) {

High

Child Process

Package source references child process execution.

dist/cli-main.jsView on unpkg · L54

57 return platform === "win32" ? "npm.cmd" : "npm";

58}

59var defaultInstall = (command, args) => new Promise((resolve4, reject) => {

60 const child = spawn(command, args, { stdio: "inherit" });

61 child.on("error", reject);

62 child.on("close", (code) => resolve4(code));

63});

64async function runUpdate(options = {}) {

65 const current = options.current ?? packageVersion();

66 const latest = await fetchLatestVersion(options);

67 if (latest === void 0 || !isValidVersion(latest)) return { status: "check-failed", current };

68 if (!gt(latest, current)) return { status: "up-to-date", current, latest };

69 const install = options.install ?? defaultInstall;

70 let exitCode;

71 try {

72 exitCode = await install(npmExecutable(options.platform), ["install", "-g", `${NPM_PACKAGE_NAME}@${latest}`]);

73 } catch {

74 exitCode = null;

•matchType = previous_version_dangerous_delta matchedPackage = flavor-code@1.3.18 matchedIdentity = npm:Zmxhdm9yLWNvZGU:1.3.18 similarity = 0.966 summary = stored previous version shares package body but lacks this dangerous source file

Critical

Previous Version Dangerous Delta

This package version adds a dangerous source file absent from the previous stored version; route for source-aware review.

dist/cli-main.jsView on unpkg

dist/chunk-PF457XCH.jsView file

339} L340: if (["powershell", "pwsh"].includes(name)) { L341: const flag = args.findIndex((arg) => ["-command", "-c"].includes(arg.toLowerCase()));

High

Shell

Package source references shell execution.

dist/chunk-PF457XCH.jsView on unpkg · L339

•Manifest-reachable source captures an API credential, sends it to a fixed unofficial gateway, and persists that redirection in agent or shell configuration. dist/chunk-PF457XCH.js: return text.replace(/\bsk-[A-Za-z0-9_-]+\b/g, "[redacted]").replace(/(authorization|api[_ -]?key|token)\s*[:=]\s*\S+/gi, "$1=[redacted]"); import { lstat, mkdir, readdir, readFile, realpath, writeFile } from "fs/promises"; await writeFile(path, `${existing}${separator}${append}${newline}`); authorizationUrl: "http://192.168.1.100:8091/authorize", await writeFile(configPath, JSON.stringify(example, null, 2) + "\n"); await writeFile(path, content); import { lstat as lstat2, mkdir as mkdir2, open, readFile as readFile2, readdir as readdir2, rename, rm, writeFile as writeFile2 } from "fs/promises"; await handle.writ

High

Credential Redirect Persistence

Manifest-reachable source sends a prompted API credential to a fixed unofficial gateway and persists the redirection.

dist/chunk-PF457XCH.jsView on unpkg

•Manifest-reachable source resolves another installed package, overwrites its runtime code, and injects package-defined remote behavior. dist/chunk-PF457XCH.js: import { lstat, mkdir, readdir, readFile, realpath, writeFile } from "fs/promises"; import { copyFileSync, mkdirSync, readdirSync } from "fs"; ...facts.instructionFiles.map((file) => `Follow \`${file}\`.`), await writeFile(path, `${existing}${separator}${append}${newline}`); await writeFile(configPath, JSON.stringify(example, null, 2) + "\n"); else if (entry2.isFile()) copyFileSync(source, target); await writeFile(path, content); import { lstat as lstat2, mkdir as mkdir2, open, readFile as readFile2, readdir as readdir2, rename, rm, writeFile as writeFile2 } from "fs/promises";

dist/astgraph/vendor/tree-sitter.jsView file

Lines 2957-2997javascript

2957 "env": proxy,

2958 "wasi_snapshot_preview1": proxy

2959 };

2960 function postInstantiation(module, instance) {

2961 updateTableMap(tableBase, metadata.tableSize);

2962

dist/astgraph/index.jsView file

Lines 9-49javascript

9// inside the host's activation timeout; WASM grammars and the database load on

10// first use.

12import { existsSync } from "node:fs";

13import { isAbsolute, join, relative } from "node:path";

15import { z } from "./vendor/zod/index.js"

dist/desktop/plugin-worker-entry.jsView file

Lines 8-48javascript

8var CONTRIBUTION_NAME_SOURCE = "^[a-zA-Z0-9][a-zA-Z0-9._:-]{0,127}$";

9var data = workerData;

10var port = parentPort;

11if (port === null) throw

dist/desktop/main.jsView file

8821function runShellHandler(descriptor, event, signal) { L8822: return new Promise((resolve41, reject) => { L8823: const child = spawn(descriptor.command, [...descriptor.args ?? []], { L8824: env: { ...process.env, ...descriptor.env }, L8825: shell: false,

High

Same File Env Network Execution

A single source file combines environment access, network access, and code or shell execution; review context before blocking.

dist/desktop/main.jsView on unpkg · L8821

8860if (code !== 0) { L8861: reject(new Error(`Shell hook exited with code ${code}: ${stderr.trim()}`)); L8862: return; ... L8864: try { L8865: resolve41(HookDecisionSchema.parse(JSON.parse(stdout))); L8866: } catch (error) { ... L8869: }); L8870: child.stdin.end(JSON.stringify(event)); L8871: }); ... L8875: if (process.platform === "win32") { L8876: const killer = spawn("taskkill", ["/pid", String(child.pid), "/t", "/f"], { L8877: stdio: "ignore",

High

Command Output Exfiltration

Source combines command execution, command-output handling, and outbound requests; review data flow before blocking.

dist/desktop/main.jsView on unpkg · L8860

8860Trigger-reachable command-output exfiltration chain: manifest.main -> dist/desktop/main.js L8860: if (code !== 0) { L8861: reject(new Error(`Shell hook exited with code ${code}: ${stderr.trim()}`)); L8862: return; ... L8864: try { L8865: resolve41(HookDecisionSchema.parse(JSON.parse(stdout))); L8866: } catch (error) { ... L8869: }); L8870: child.stdin.end(JSON.stringify(event)); L8871: }); ... L8875: if (process.platform === "win32") { L8876: const killer = spawn("taskkill", ["/pid", String(child.pid), "/t", "/f"], { L8877: stdio: "ignore",

dist/cli.jsView file

11Cross-file remote execution chain: dist/cli.js spawns dist/desktop/main.js; helper contains network access plus dynamic code execution. L11: // src/launcher.ts L12: import { spawn } from "child_process"; L13: import { realpathSync, readFileSync } from "fs"; ... L50: try { L51: marker = parseMemoryRestartMarker(readFileSync(memoryRestartMarkerPath(process.cwd()), "utf8")); L52: } catch { ... L56: if (resumed !== void 0) { L57: process.stderr.write(`flavor launcher: heap watermark restart, resuming session ${marker.sessionId} L58: `);

High

Cross File Remote Execution Context

Source spawns a local helper that also contains network and dynamic execution context; review data flow before blocking.

dist/cli.jsView on unpkg · L11

•matchType = normalized_sha256 matchedPackage = flavor-code@1.3.17 matchedPath = dist/cli.js matchedIdentity = npm:Zmxhdm9yLWNvZGU:1.3.17 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

dist/cli.jsView on unpkg

dist/astgraph/vendor/tree-sitter.wasmView file

•path = dist/astgraph/vendor/tree-sitter.wasm kind = wasm_module sizeBytes = 205488 magicHex = [redacted]

Medium

Ships Wasm Module

Package ships WebAssembly modules.

dist/astgraph/vendor/tree-sitter.wasmView on unpkg

dist/chunk-HJOCNKPN.jsView file

•matchType = normalized_sha256 matchedPackage = flavor-code@1.3.17 matchedPath = dist/chunk-HJOCNKPN.js matchedIdentity = npm:Zmxhdm9yLWNvZGU:1.3.17 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

dist/chunk-HJOCNKPN.jsView on unpkg

dist/chunk-RQTYHUMK.jsView file

•matchType = normalized_sha256 matchedPackage = flavor-code@1.3.17 matchedPath = dist/chunk-RQTYHUMK.js matchedIdentity = npm:Zmxhdm9yLWNvZGU:1.3.17 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

dist/chunk-RQTYHUMK.jsView on unpkg

Source & flagged code

19 flagged · loading source

dist/cli-main.jsView file

Critical

Previous Version Dangerous Delta

This package version adds a dangerous source file absent from the previous stored version; route for source-aware review.

dist/cli-main.jsView on unpkg

54// src/update/apply.ts L55: import { spawn } from "child_process"; L56: function npmExecutable(platform = process.platform) {

High

Child Process

Package source references child process execution.

dist/cli-main.jsView on unpkg · L54

dist/chunk-PF457XCH.jsView file

339} L340: if (["powershell", "pwsh"].includes(name)) { L341: const flag = args.findIndex((arg) => ["-command", "-c"].includes(arg.toLowerCase()));

High

Shell

Findings

1 Critical13 High6 Medium7 Low

CriticalPrevious Version Dangerous Deltadist/cli-main.js

HighChild Processdist/cli-main.js

HighShelldist/chunk-PF457XCH.js

HighSame File Env Network Executiondist/desktop/main.js

HighCredential Redirect Persistencedist/chunk-PF457XCH.js

HighEntrypoint Foreign Package Code Overwritedist/chunk-PF457XCH.js

HighCommand Output Exfiltrationdist/desktop/main.js

HighCross File Remote Execution Contextdist/cli.js

HighTrigger Reachable Command Output Exfiltrationdist/desktop/main.js

HighKnown Malware Source Similaritydist/chunk-PF457XCH.js

HighKnown Malware Source Similaritydist/cli.js

Affected versions and remediation

This report applies to flavor-code@1.3.19.

See all versions of flavor-code for other recorded verdicts.

Review the evidence and your use of flavor-code@1.3.19 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: 2026-08-30 02:15:19.626Z (UTC).

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