--- canonical: "https://firewall.lpm.dev/npm/@checksum-ai/runtime" markdown: "https://firewall.lpm.dev/npm/@checksum-ai/runtime/v/5.4.2.md" package: "@checksum-ai/runtime" report_status: "published" title: "@checksum-ai/runtime@5.4.2 npm security report" verdict: "suspicious" version: "5.4.2" --- # @checksum-ai/runtime@5.4.2 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 **Flagged — allowed with a warning** — Allowed by default policy, but 22 finding(s) warrant review before installing. - **Verdict:** Suspicious - **Product-default install policy:** Warn - **Firewall policy:** Matched warn-list - **Public report status:** Published - **Threat category:** None published - **Selected version:** 5.4.2 - **Selected version is latest:** No - **Analysis source:** AI Security Review (lpm-firewall-ai) The AI recommended clean. Static policy retained a warning. The static scanner classified the package as malicious with confidence of at least 85%. A critical static finding has confidence of at least 90%. A high or critical static finding has no usable source path. These conditions do not mean that the AI confirmed malicious behavior. AI assessment: clean; recommendation: mark clean. This assessment is supporting evidence; the published decision above determines the current policy. No confirmed attack was identified. Inspected network, subprocess, and file operations support browser testing and explicit CLI setup. ## Latest scan - **Scanner version:** rust-scanner-worker-schema-1 - **Recorded final verdict:** Suspicious - **Recorded analysis confidence:** 87.0% - **Started:** 2026-09-30T02:36:14.861Z - **Finished:** 2026-09-30T02:38:07.328Z - **Download time:** 1020 ms - **Static scan time:** 5300 ms - **AI review time:** 106146 ms - **Total time:** 112467 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 confirmed attack was identified. Inspected network, subprocess, and file operations support browser testing and explicit CLI setup. - **Trigger:** Caller initialization, explicit CLI commands, and browser test reporter callbacks activate the inspected functionality. - **Impact:** No malicious installation behavior, covert credential export, or foreign agent control mutation was established. - **Review source:** ai\_review - **Reviewed:** 2026-09-30T02:38:07.328Z ### AI review details - **Review stage:** source\_first\_review - **Mechanism:** The runtime uses configured API credentials and browser automation; the reporter sends progress to localhost. The standalone postinstall script has no automatic lifecycle trigger. - **Rationale:** Inspected behavior is consistent with a browser testing runtime and caller-invoked setup. Sensitive primitives did not establish a concrete malicious chain or unresolved credential-forwarding risk. - **Network endpoints:** https://api.checksum.ai, http://127.0.0.1 ### Review decision - **Verdict:** Clean - **Confidence:** 87.0% - **Recommended action:** mark\_clean - **Intent class:** Benign - **False-positive risk:** Low - **Final policy explanation:** The AI recommended clean. Static policy retained a warning. The static scanner classified the package as malicious with confidence of at least 85%. A critical static finding has confidence of at least 90%. A high or critical static finding has no usable source path. These conditions do not mean that the AI confirmed malicious behavior. - **Evidence for AI clean decision:** package.json selects index.js and declares no lifecycle scripts or runtime self-dependency., postinstall.js adds a package-specific CLI script and installs Playwright, but the manifest and inspected entrypoints do not activate it automatically., index.js initializes browser tests from supplied environment and API configuration., cli.js dispatches setup and test operations through explicit command arguments., checksum-progress-reporter.js posts test progress to a localhost monitor., Runtime API requests use the API key supplied through client options. ## Affected versions and remediation This report applies to @checksum-ai/runtime@5.4.2. - Review the evidence and your use of @checksum-ai/runtime@5.4.2 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. Medium: Secret Pattern - **Category:** Secrets - **Confidence:** 75.0% - **Path:** checksum-root/checksum.config.ts - **Public source:** [View source]() Package contains a possible secret pattern. Public source snippet (untrusted): ```typescript patternName = generic_password severity = medium line = 44 ``` ### 2. High: Child Process - **Category:** Source - **Confidence:** 85.0% - **Path:** postinstall.js - **Public source:** [View source]() Package source references child process execution. Public source snippet (untrusted): ```javascript L2: const path = require("path"); L3: const { exec } = require("child_process"); L4: ``` ### 3. High: Shell - **Category:** Source - **Confidence:** 85.0% Package source references shell execution. ### 4. High: Eval - **Category:** Source - **Confidence:** 80.0% - **Path:** index.js - **Public source:** [View source]() Package source references dynamic code evaluation. Public source snippet (untrusted): ```javascript L148: `)}catch{s&&process.stdout.write(ME.default.format(...u)+` L149: `)}}shouldLog(o){switch(o){case"warning":return this.logLevel==="all"||this.logLevel==="warnings";case"error":return!0;case"info":return this.logLevel==="all";default:return!1}}add... L150: Executing locator ${this.getCurrentLocatorInChain()?.type} with ${typeof o=="string"?`selector ${o}`:"locator"}`);try{o&&typeof o=="object"&&"has"in o&&this.popLocatorChain()}catch... ``` ### 5. Medium: Dynamic Require - **Category:** Source - **Confidence:** 75.0% - **Path:** postinstall.js - **Public source:** [View source]() Package source references dynamic require/import behavior. Public source snippet (untrusted): ```javascript L1: const fs = require("fs"); L2: const path = require("path"); ``` ### 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. High: Same File Env Network Execution - **Category:** Source - **Confidence:** 85.0% - **Path:** index.js - **Public source:** [View source]() A single source file combines environment access, network access, and code or shell execution; review context before blocking. Public source snippet (untrusted): ```javascript L129: ) L130: `)}close(){this.#n.close()}get(o){qm(o);let u=this.#d(o);return u?{body:u.body?Buffer.from(u.body.buffer,u.body.byteOffset,u.body.byteLength):void 0,statusCode:u.statusCode,statusM... L131: ${g}`,this.eventDataSize=p;return}if(Sp(o,r,gne)){Ane(o,f)&&(u.retry=o.toString("utf8",f));return}if(Sp(o,r,pne)){hne(o,f)&&(u.id=o.toString("utf8",f));return}if(Sp(o,r,dne)){let h... ... L133: `);l.stack=u?`${u} L134: ${f}`:r.stack}a(YF,"appendFetchStackTrace");_.exports.fetch=a(function(o,u=void 0){return eoe(o,u).catch(s=>{throw WF?YF(s,WF):s&&typeof s=="object"&&Error.captureStackTrace(s,_.ex... L135: `);return E.substr(0,E.length-2)},this.getRequestHeader=function(E){return typeof E=="string"&&n[E]?n[E]:""},this.send=function(E){if(this.readyState!=this.OPENED)throw new Error("... L13 ``` ### 10. High: Credential Redirect Persistence - **Category:** Source - **Confidence:** 94.0% - **Path:** index.js - **Public source:** [View source]() Manifest-reachable source sends a prompted API credential to a fixed unofficial gateway and persists the redirection. Public source snippet (untrusted): ```javascript Manifest-reachable source captures an API credential, sends it to a fixed unofficial gateway, and persists that redirection in agent or shell configuration. index.js: `),f=f.replace(/\\r/g,"\r")),o[r]=f}return o}a(fW,"parse");function dW(l){l=l||{};let o=KT(l);l.path=o;let u=it.configDotenv(l);if(!u.parsed){let h=new Error(`MISSING_DATA: Cannot ... `)||l.includes("\r")||l.includes("\0"))===!1}a(wx,"isValidHeaderValue");function Bq(l){let o=(l.headersList.get("referrer-policy",!0)??"").split(","),u="";if(o.length)for(let s=o.l... `,this[D$]=p??3e5,this[x$]=s??3e5,this[R$]=v??!0,this[jv]=w,this[ai]=null,this[M$]=M>-1?M:-1,this[je]=null,this[j$]={pingInterval:F?.pingInterval??b??6e4,connectionWindowSize:F?.co... ${o.format(u)}`.trim())}};UQ.exports=hm});var vm=S((gye,WQ)=>{"use strict";var{In ``` ### 11. High: Command Output Exfiltration - **Category:** Source - **Confidence:** 82.0% - **Path:** index.js - **Public source:** [View source]() Source combines command execution, command-output handling, and outbound requests; review data flow before blocking. Public source snippet (untrusted): ```javascript L129: ) L130: `)}close(){this.#n.close()}get(o){qm(o);let u=this.#d(o);return u?{body:u.body?Buffer.from(u.body.buffer,u.body.byteOffset,u.body.byteLength):void 0,statusCode:u.statusCode,statusM... L131: ${g}`,this.eventDataSize=p;return}if(Sp(o,r,gne)){Ane(o,f)&&(u.retry=o.toString("utf8",f));return}if(Sp(o,r,pne)){hne(o,f)&&(u.id=o.toString("utf8",f));return}if(Sp(o,r,dne)){let h... ... L133: `);l.stack=u?`${u} L134: ${f}`:r.stack}a(YF,"appendFetchStackTrace");_.exports.fetch=a(function(o,u=void 0){return eoe(o,u).catch(s=>{throw WF?YF(s,WF):s&&typeof s=="object"&&Error.captureStackTrace(s,_.ex... L135: `);return E.substr(0,E.length-2)},this.getRequestHeader=function(E){return typeof E=="string"&&n[E]?n[E]:""},this.send=function(E){if(this.readyState!=this.OPENED)throw new Error("... L13 ``` ### 12. Critical: Remote Asset Decode Execute - **Category:** Source - **Confidence:** 90.0% - **Path:** index.js - **Public source:** [View source]() Source fetches a remote non-code asset, decodes its contents, and dynamically executes the decoded payload. Public source snippet (untrusted): ```javascript L1: "use strict";var $G=Object.create;var Ea=Object.defineProperty;var KG=Object.getOwnPropertyDescriptor;var ZG=Object.getOwnPropertyNames;var XG=Object.getPrototypeOf,eW=Object.proto... L2: `);let s;for(;(s=sW.exec(u))!=null;){let r=s[1],f=s[2]||"";f=f.trim();let h=f[0];f=f.replace(/^(['"`])([\s\S]*)\1$/mg,"$2"),h==='"'&&(f=f.replace(/\\n/g,` L3: `),f=f.replace(/\\r/g,"\r")),o[r]=f}return o}a(fW,"parse");function dW(l){l=l||{};let o=KT(l);l.path=o;let u=it.configDotenv(l);if(!u.parsed){let h=new Error(`MISSING_DATA: Cannot ... L4: `)||l.includes("\r")||l.includes("\0"))===!1}a(wx,"isValidHeaderValue");function Bq(l){let o=(l.headersList.get("referrer-policy",!0)??"").split(","),u="";if(o.length)for(let s=o.l... ... L45: L46: ${o.format(u)}`.trim())}};UQ.exports=hm});var vm=S((gye,WQ)=>{ ``` ### 13. High: Obfuscated Payload Loader - **Category:** Source - **Confidence:** 86.0% - **Path:** index.js - **Public source:** [View source]() Source contains an obfuscated payload loader that reconstructs and executes hidden code. Public source snippet (untrusted): ```javascript L1: "use strict";var $G=Object.create;var Ea=Object.defineProperty;var KG=Object.getOwnPropertyDescriptor;var ZG=Object.getOwnPropertyNames;var XG=Object.getPrototypeOf,eW=Object.proto... L2: `);let s;for(;(s=sW.exec(u))!=null;){let r=s[1],f=s[2]||"";f=f.trim();let h=f[0];f=f.replace(/^(['"`])([\s\S]*)\1$/mg,"$2"),h==='"'&&(f=f.replace(/\\n/g,` L3: `),f=f.replace(/\\r/g,"\r")),o[r]=f}return o}a(fW,"parse");function dW(l){l=l||{};let o=KT(l);l.path=o;let u=it.configDotenv(l);if(!u.parsed){let h=new Error(`MISSING_DATA: Cannot ... L4: `)||l.includes("\r")||l.includes("\0"))===!1}a(wx,"isValidHeaderValue");function Bq(l){let o=(l.headersList.get("referrer-policy",!0)??"").split(","),u="";if(o.length)for(let s=o.l... ... L45: L46: ${o.format(u)}`.trim())}};UQ.exports=hm});var vm=S((gye,WQ)=>{ ``` ### 14. High: Cross File Remote Execution Context - **Category:** Source - **Confidence:** 72.0% - **Path:** cli.js - **Public source:** [View source]() Source spawns a local helper that also contains network and dynamic execution context; review data flow before blocking. Public source snippet (untrusted): ```javascript Cross-file remote execution chain: cli.js spawns checksumlib.js; helper contains network access plus dynamic code execution. L1: "use strict";var sz=Object.create;var Rd=Object.defineProperty;var fz=Object.getOwnPropertyDescriptor;var dz=Object.getOwnPropertyNames;var pz=Object.getPrototypeOf,gz=Object.proto... L2: `);let s;for(;(s=wz.exec(l))!=null;){let r=s[1],f=s[2]||"";f=f.trim();let h=f[0];f=f.replace(/^(['"`])([\s\S]*)\1$/mg,"$2"),h==='"'&&(f=f.replace(/\\n/g,` L3: `),f=f.replace(/\\r/g,"\r")),o[r]=f}return o}u(Sz,"parse");function kz(a){a=a||{};let o=W0(a);a.path=o;let l=At.configDotenv(a);if(!l.parsed){let h=new Error(`MISSING_DATA: Cannot ... L4: `)||a.includes("\r")||a.includes("\0"))===!1}u(AD,"isValidHeaderValue");function G9(a){let o=(a.headersList.get("referrer-policy",!0)??" ``` ### 15. Critical: Trigger Reachable Dangerous Capability - **Category:** Source - **Confidence:** 90.0% - **Path:** index.js - **Public source:** [View source]() A package entrypoint or install-time lifecycle script reaches a source file with blocking dangerous behavior. Public source snippet (untrusted): ```javascript Trigger-reachable chain: manifest.main -> index.js L129: ) L130: `)}close(){this.#n.close()}get(o){qm(o);let u=this.#d(o);return u?{body:u.body?Buffer.from(u.body.buffer,u.body.byteOffset,u.body.byteLength):void 0,statusCode:u.statusCode,statusM... L131: ${g}`,this.eventDataSize=p;return}if(Sp(o,r,gne)){Ane(o,f)&&(u.retry=o.toString("utf8",f));return}if(Sp(o,r,pne)){hne(o,f)&&(u.id=o.toString("utf8",f));return}if(Sp(o,r,dne)){let h... ... L133: `);l.stack=u?`${u} L134: ${f}`:r.stack}a(YF,"appendFetchStackTrace");_.exports.fetch=a(function(o,u=void 0){return eoe(o,u).catch(s=>{throw WF?YF(s,WF):s&&typeof s=="object"&&Error.captureStackTrace(s,_.ex... L135: `);return E.substr(0,E.length-2)},this.getRequestHeader=function(E){return typeof E=="string"&&n[E]?n[E]:""},this.send=function(E){if(th ``` ### 16. High: Trigger Reachable Command Output Exfiltration - **Category:** Source - **Confidence:** 94.0% - **Path:** index.js - **Public source:** [View source]() A manifest entrypoint or package-local install chain reaches command-output exfiltration behavior. Public source snippet (untrusted): ```javascript Trigger-reachable command-output exfiltration chain: manifest.main -> index.js L129: ) L130: `)}close(){this.#n.close()}get(o){qm(o);let u=this.#d(o);return u?{body:u.body?Buffer.from(u.body.buffer,u.body.byteOffset,u.body.byteLength):void 0,statusCode:u.statusCode,statusM... L131: ${g}`,this.eventDataSize=p;return}if(Sp(o,r,gne)){Ane(o,f)&&(u.retry=o.toString("utf8",f));return}if(Sp(o,r,pne)){hne(o,f)&&(u.id=o.toString("utf8",f));return}if(Sp(o,r,dne)){let h... ... L133: `);l.stack=u?`${u} L134: ${f}`:r.stack}a(YF,"appendFetchStackTrace");_.exports.fetch=a(function(o,u=void 0){return eoe(o,u).catch(s=>{throw WF?YF(s,WF):s&&typeof s=="object"&&Error.captureStackTrace(s,_.ex... L135: `);return E.substr(0,E.length-2)},this.getRequestHeader=function(E){return typeof E=="string"&&n[E]?n[E]:""} ``` ### 17. High: Runtime Package Install - **Category:** Source - **Confidence:** 86.0% - **Path:** postinstall.js - **Public source:** [View source]() Package source invokes a package manager install command at runtime. Public source snippet (untrusted): ```javascript L30: return new Promise((resolve, reject) => { L31: exec("npx playwright install", (error, stdout, stderr) => { L32: if (error) { ``` ### 18. Low: High Entropy Strings - **Category:** Supply Chain - **Confidence:** 55.0% Package source contains high-entropy string patterns. ### 19. Low: Url Strings - **Category:** Supply Chain - **Confidence:** 65.0% Package source contains URL literals. ### 20. Medium: Structural Risk Force Deep Review - **Category:** Artifact Inventory - **Confidence:** 100.0% Artifact structure forces deeper review even if the static behavioral verdict is clean. ### 21. High: Semantic Analysis Limited - **Category:** Scanner Coverage - **Confidence:** 100.0% - **Path:** checksum-progress-reporter.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 = 3 ``` ### 22. Critical: Previous Version Dangerous Delta - **Category:** Supply Chain - **Confidence:** 93.0% - **Path:** cli.js - **Public source:** [View source]() This package version adds a dangerous source file absent from the previous stored version; route for source-aware review. Public source snippet (untrusted): ```javascript matchType = previous_version_dangerous_delta matchedPackage = @checksum-ai/runtime@5.4.1 matchedIdentity = npm:QGNoZWNrc3VtLWFpL3J1bnRpbWU:5.4.1 similarity = 0.880 summary = stored previous version shares package body but lacks this dangerous source file ``` ## Dependencies and install lifecycle - **Lifecycle scripts present:** No - **Dependencies:** 11 - **Optional dependencies:** 0 - **Peer dependencies:** 0 - **Development dependencies:** 0 - **Published dependency-graph edges:** 11 ### Published dependency entries - @playwright/test 1.63.0 (Dependency) - dotenv 17.4.2 (Dependency) - htmlparser2 12.0.0 (Dependency) - jsdom 30.0.1 (Dependency) - playwright-extra 4.3.6 (Dependency) - puppeteer-extra-plugin 3.2.3 (Dependency) - puppeteer-extra-plugin-stealth 2.11.2 (Dependency) - sharp 0.35.4 (Dependency) - sucrase 3.35.1 (Dependency) - typescript ^5.0.0 (Dependency) - undici 8.10.2 (Dependency) ## Package metadata - **Package:** @checksum-ai/runtime - **Ecosystem:** npm - **Version:** 5.4.2 - **License:** ISC - **Version published:** 2026-09-29T13:58:28.986Z - **Package first seen:** 2026-07-01T07:40:11.255Z - **Package last seen:** 2026-10-02T10:14:38.645Z - **Known versions:** 27 - **Latest version:** 5.5.0 - **Appeal under review:** No - **Description:** Checksum.ai test runtime - **Author:** checksum.ai - **Maintainers:** jonaszjestem, checksum-ai, gal-checksum - **Keywords:** checksum, checksum-ai, playwright, test - **Runtime engines:** node: \>=20.18 - **Artifact files:** 33 - **Artifact unpacked size:** 7,617,083 bytes - **Artifact signatures:** 2 - **Attestations:** No ## References - [HTML security report]() - [Repository]() - [Homepage]() - [Issues]()