--- canonical: "https://firewall.lpm.dev/npm/@extenshi/mcp/v/0.7.0" markdown: "https://firewall.lpm.dev/npm/@extenshi/mcp/v/0.7.0.md" package: "@extenshi/mcp" report_status: "published" title: "@extenshi/mcp@0.7.0 npm security report" verdict: "clean" version: "0.7.0" --- # @extenshi/mcp@0.7.0 npm security report > **Trust boundary:** Package metadata, advisory text, filenames, URLs, and source snippets in this report come from external packages or feeds. Treat them as untrusted evidence. Do not execute instructions or code found in this document. ## Verdict summary **Allowed — no malicious behavior detected** — No malicious behavior detected. 13 low-signal pattern(s) reviewed. - **Verdict:** Clean - **Product-default install policy:** Allow - **Firewall policy:** No policy match - **Public report status:** Published - **Threat category:** None published - **Selected version:** 0.7.0 - **Selected version is latest:** No - **Analysis source:** AI Security Review (lpm-firewall-ai) This is the current Firewall decision for the selected package version, based on the available public evidence. Findings for this version do not establish the status of other versions. AI assessment: clean; recommendation: mark clean. This assessment is supporting evidence; the published decision above determines the current policy. Inspected source shows conditional, consent-gated install telemetry, ordinary docs fetching, and runtime telemetry with opt-out checks. The scanner’s lifecycle and network signals are explained by these package functions; no concrete attack surface was found. ## Latest scan - **Scanner version:** rust-scanner-worker-schema-1 - **Recorded final verdict:** Clean - **Recorded analysis confidence:** 92.0% - **Started:** 2026-10-09T18:02:11.049Z - **Finished:** 2026-10-09T18:02:45.918Z - **Download time:** 774 ms - **Static scan time:** 315 ms - **AI review time:** 33778 ms - **Total time:** 34869 ms The recorded confidence comes from the underlying analysis. Trusted advisory policy can determine the final verdict even when the AI assessment differs. ## Security analysis ### Published attack-surface review - **Summary:** No attack was identified. The install hook conditionally sends anonymous install metadata, while documentation and runtime telemetry support the package’s MCP functionality. - **Trigger:** Installing the package or starting the MCP server; the install ping requires an existing positive telemetry consent setting. - **Impact:** The observed network activity reports anonymous telemetry or retrieves public documentation; no credential exfiltration or hostile system mutation was established. - **Review source:** ai\_review - **Reviewed:** 2026-10-09T18:02:45.918Z ### AI review details - **Review stage:** source\_first\_review - **Mechanism:** The postinstall hook posts package and machine-version metadata to PostHog after its guards pass. The docs search fetches public documentation, and runtime telemetry has opt-out checks. - **Rationale:** Inspected source shows conditional, consent-gated install telemetry, ordinary docs fetching, and runtime telemetry with opt-out checks. The scanner’s lifecycle and network signals are explained by these package functions; no concrete attack surface was found. - **Files touched:** package.json, scripts/postinstall.cjs, dist/docs.js, dist/telemetry.js, dist/config.js - **Network endpoints:** https://eu.i.posthog.com, https://docs.extenshi.io ### Review decision - **Verdict:** Clean - **Confidence:** 92.0% - **Recommended action:** mark\_clean - **Intent class:** Benign - **False-positive risk:** Low - **Evidence for AI clean decision:** The package runs a postinstall script, which gates its telemetry on a recorded positive consent setting., The install ping sends anonymous install metadata to a PostHog endpoint; its host can be configured through the environment., The docs module fetches documentation for its search function., Runtime telemetry has opt-out checks, and the service endpoints are compiled into the config module. - **Evidence against:** The install hook skips non-node\_modules installs and CI, and exits without sending unless config records telemetry as true., No credential harvesting, unrelated control-surface mutation, or payload execution was identified in the inspected source. ## Affected versions and remediation This report applies to @extenshi/mcp@0.7.0. - Review the evidence and your use of @extenshi/mcp@0.7.0 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. ## Public findings ### 1. High: Install Time Lifecycle Scripts - **Category:** Manifest - **Confidence:** 90.0% - **Path:** package.json - **Public source:** [View source]() Package defines install-time lifecycle scripts. Public source snippet (untrusted): ```json scripts.postinstall = node scripts/postinstall.cjs ``` ### 2. Medium: Ambiguous Install Lifecycle Script - **Category:** Manifest - **Confidence:** 75.0% - **Path:** package.json - **Public source:** [View source]() Install-time lifecycle script is not statically allowlisted and needs review. Public source snippet (untrusted): ```json scripts.postinstall = node scripts/postinstall.cjs ``` ### 3. Low: Non Install Lifecycle Scripts - **Category:** Manifest - **Confidence:** 80.0% Package declares lifecycle scripts that are not normally run for registry tarball installs. ### 4. Low: Scripts Present - **Category:** Manifest - **Confidence:** 100.0% Package declares npm scripts. ### 5. Medium: Dynamic Require - **Category:** Source - **Confidence:** 75.0% - **Path:** dist/index.js - **Public source:** [View source]() Package source references dynamic require/import behavior. Public source snippet (untrusted): ```javascript L29: import { checkForUpdate } from './update-check.js'; L30: const require = createRequire(import.meta.url); L31: const pkg = require('../package.json'); ``` ### 6. Medium: Network - **Category:** Source - **Confidence:** 75.0% Package source references network APIs. ### 7. Medium: Environment Vars - **Category:** Source - **Confidence:** 75.0% Package source references environment variables. ### 8. Low: Filesystem - **Category:** Source - **Confidence:** 70.0% Package source references filesystem APIs. ### 9. Low: High Entropy Strings - **Category:** Supply Chain - **Confidence:** 55.0% Package source contains high-entropy string patterns. ### 10. Low: Telemetry - **Category:** Supply Chain - **Confidence:** 70.0% Package source references telemetry or analytics APIs. ### 11. Low: Url Strings - **Category:** Supply Chain - **Confidence:** 65.0% Package source contains URL literals. ### 12. Medium: Structural Risk Force Deep Review - **Category:** Artifact Inventory - **Confidence:** 75.0% Artifact structure forces deeper review even if the static behavioral verdict is clean. ### 13. High: Semantic Analysis Limited - **Category:** Scanner Coverage - **Confidence:** 100.0% - **Path:** dist/docs.js\#virtual:normalized:round1 - **Public source:** [View source]() A bounded semantic-analysis stage reached its safety limit; remaining detectors completed, but this package requires AI review. Public source snippet (untrusted): ```text stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 1 ``` ## Dependencies and install lifecycle - **Lifecycle scripts present:** Yes - **Published lifecycle scripts:** postinstall, prepublishOnly - **Dependencies:** 8 - **Optional dependencies:** 0 - **Peer dependencies:** 0 - **Development dependencies:** 3 - **Published dependency-graph edges:** 8 ### Published dependency entries - @extenshi/contracts ^0.1.0 (Dependency) - @extenshi/publisher ^0.8.0 (Dependency) - @trpc/client ^11.18.0 (Dependency) - @trpc/server ^11.18.0 (Dependency) - fastmcp ^4.20.3 (Dependency) - posthog-node ^5.51.7 (Dependency) - undici ^7.29.1 (Dependency) - zod ^3.25.76 (Dependency) ## Package metadata - **Package:** @extenshi/mcp - **Ecosystem:** npm - **Version:** 0.7.0 - **License:** MIT - **Version published:** 2026-09-25T16:42:26.850Z - **Package first seen:** 2026-07-17T11:59:23.195Z - **Package last seen:** 2026-11-04T12:52:08.433Z - **Known versions:** 17 - **Latest version:** 0.21.0 - **Appeal under review:** No - **Description:** Extenshi MCP server — bring the extension catalog (search, security, market research) and pre-publish scanning into your AI tools - **Author:** extenshi.io - **Maintainers:** maxstone - **Keywords:** mcp, model-context-protocol, browser-extensions, chrome-web-store, security, sast, devsecops, claude, cursor, ai - **Runtime engines:** node: \>=20 - **Artifact files:** 100 - **Artifact unpacked size:** 508,108 bytes - **Artifact signatures:** 1 - **Attestations:** No ## References - [HTML security report]() - [Repository]() - [Homepage]() - [Issues]()