--- canonical: "https://firewall.lpm.dev/npm/@checksum-ai/runtime" markdown: "https://firewall.lpm.dev/npm/@checksum-ai/runtime/v/5.3.0.md" package: "@checksum-ai/runtime" report_status: "published" title: "@checksum-ai/runtime@5.3.0 npm security report" verdict: "suspicious" version: "5.3.0" --- # @checksum-ai/runtime@5.3.0 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 **Flagged — allowed with a warning** — Allowed by default policy, but 23 finding(s) warrant review before installing. - **Verdict:** Suspicious - **Product-default install policy:** Warn - **Firewall policy:** Matched warn-list - **Public report status:** Published - **Threat category:** Remote Code Execution - **Selected version:** 5.3.0 - **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: suspicious; recommendation: downgrade to warn. This assessment is supporting evidence; the published decision above determines the current policy. During a Checksum test recovery flow, dynamically constructed actions can execute in the test process. The package also contains a dormant project-mutating installer script, but the manifest does not register it as a lifecycle hook. ## Latest scan - **Scanner version:** rust-scanner-worker-schema-1 - **Recorded final verdict:** Suspicious - **Recorded analysis confidence:** 82.0% - **Started:** 2026-09-13T01:46:59.216Z - **Finished:** 2026-09-13T01:48:45.318Z - **Download time:** 511 ms - **Static scan time:** 5338 ms - **AI review time:** 100251 ms - **Total time:** 106102 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:** During a Checksum test recovery flow, dynamically constructed actions can execute in the test process. The package also contains a dormant project-mutating installer script, but the manifest does not register it as a lifecycle hook. - **Trigger:** Running a Checksum Playwright recovery flow; separately, explicitly executing postinstall.js. - **Impact:** A compromised recovery-action source could run unintended actions in the test environment. - **Evidence paths:** index.js, postinstall.js, package.json - **Review source:** ai\_review - **Reviewed:** 2026-09-13T01:48:45.318Z ### AI review details - **Review stage:** source\_first\_review - **Mechanism:** Dynamic action evaluation and a dormant project manifest mutator. - **Rationale:** The package has a dangerous runtime execution capability and a dormant project-mutating script, warranting a warning. There is no registered lifecycle hook or concrete evidence of malicious intent or automatic compromise. - **Files touched:** index.js, postinstall.js, package.json - **Network endpoints:** https://api.checksum.ai ### Review decision - **Verdict:** Suspicious - **Confidence:** 82.0% - **Recommended action:** downgrade\_to\_warn - **Intent class:** Critical Vulnerability - **False-positive risk:** Medium - **Evidence for warning:** Runtime code uses dynamic function construction, creating an execution sink., A shipped installer script can rewrite the consuming project's package.json and invoke a shell command if it is executed. - **Evidence against:** package.json defines no npm lifecycle script, so postinstall.js is not automatically run., The manifest has no self-dependency or install-time network hook., The risky runtime functionality is tied to the package's Playwright test and recovery features. ## Affected versions and remediation This report applies to @checksum-ai/runtime@5.3.0. - Review the evidence and your use of @checksum-ai/runtime@5.3.0 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. Critical: Critical Secret - **Category:** Secrets - **Confidence:** 90.0% - **Path:** .env - **Public source:** [View source]() Package contains a critical-looking secret pattern. Public source snippet (untrusted): ```text patternName = blocked_file severity = critical blockedFile = .env redactedSecretContext = secretLikeLines = 1 L1: CHECKSUM_RUNTIME_BUILD_TIME= ``` ### 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(xC.default.format(...l)+` 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){UO(o);let l=this.#d(o);return l?{body:l.body?Buffer.from(l.body.buffer,l.body.byteOffset,l.body.byteLength):void 0,statusCode:l.statusCode,statusM... L131: ${h}`;return}if(qg(o,r,Fse)){Mse(o,f)&&(l.retry=o.toString("utf8",f));return}if(qg(o,r,_se)){Use(o,f)&&(l.id=o.toString("utf8",f));return}if(qg(o,r,Lse)){let h=o.toString("utf8",f)... ... L133: `);a.stack=l?`${l} L134: ${f}`:r.stack}u(S4,"appendFetchStackTrace");U.exports.fetch=u(function(o,l=void 0){return bfe(o,l).catch(s=>{throw I4?S4(s,I4):s&&typeof s=="object"&&Error.captureStackTrace(s,U.ex... L135: `);return I.substr(0,I.length-2)},this.getRequestHeader=function(I){return typeof I=="string"&&n[I]?n[I]:""},this.send=function(I){if(this.readyState!=this.OPENED)throw new Error("... ``` ### 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}u(e5,"parse");function t5(a){a=a||{};let o=UR(a);a.path=o;let l=dt.configDotenv(a);if(!l.parsed){let h=new Error(`MISSING_DATA: Cannot ... `)||a.includes("\r")||a.includes("\0"))===!1}u(p2,"isValidHeaderValue");function AZ(a){let o=(a.headersList.get("referrer-policy",!0)??"").split(","),l="";if(o.length)for(let s=o.l... `,this[yee]=p??3e5,this[Aee]=s??3e5,this[vee]=v??!0,this[LE]=k,this[Mi]=null,this[Oee]=_>-1?_:-1,this[Ge]=null,this[See]={pingInterval:M?.pingInterval??m??6e4,connectionWindowSize:... ${o.format(l)}`.trim())}};O3.exports=fO});var pO=b((exe,k3)=>{"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){UO(o);let l=this.#d(o);return l?{body:l.body?Buffer.from(l.body.buffer,l.body.byteOffset,l.body.byteLength):void 0,statusCode:l.statusCode,statusM... L131: ${h}`;return}if(qg(o,r,Fse)){Mse(o,f)&&(l.retry=o.toString("utf8",f));return}if(qg(o,r,_se)){Use(o,f)&&(l.id=o.toString("utf8",f));return}if(qg(o,r,Lse)){let h=o.toString("utf8",f)... ... L133: `);a.stack=l?`${l} L134: ${f}`:r.stack}u(S4,"appendFetchStackTrace");U.exports.fetch=u(function(o,l=void 0){return bfe(o,l).catch(s=>{throw I4?S4(s,I4):s&&typeof s=="object"&&Error.captureStackTrace(s,U.ex... L135: `);return I.substr(0,I.length-2)},this.getRequestHeader=function(I){return typeof I=="string"&&n[I]?n[I]:""},this.send=function(I){if(this.readyState!=this.OPENED)throw new Error("... L13 ``` ### 12. Critical: Remote Asset Decode Execute - **Category:** Source - **Confidence:** 90.0% - **Path:** index.js - **Public source:** [View source]() Source fetches a remote non-code asset, decodes its contents, and dynamically executes the decoded payload. Public source snippet (untrusted): ```javascript L1: "use strict";var MK=Object.create;var xu=Object.defineProperty;var UK=Object.getOwnPropertyDescriptor;var jK=Object.getOwnPropertyNames;var HK=Object.getPrototypeOf,WK=Object.proto... L2: `);let s;for(;(s=XK.exec(l))!=null;){let r=s[1],f=s[2]||"";f=f.trim();let h=f[0];f=f.replace(/^(['"`])([\s\S]*)\1$/mg,"$2"),h==='"'&&(f=f.replace(/\\n/g,` L3: `),f=f.replace(/\\r/g,"\r")),o[r]=f}return o}u(e5,"parse");function t5(a){a=a||{};let o=UR(a);a.path=o;let l=dt.configDotenv(a);if(!l.parsed){let h=new Error(`MISSING_DATA: Cannot ... L4: `)||a.includes("\r")||a.includes("\0"))===!1}u(p2,"isValidHeaderValue");function AZ(a){let o=(a.headersList.get("referrer-policy",!0)??"").split(","),l="";if(o.length)for(let s=o.l... ... L45: L46: ${o.format(l)}`.trim())}};O3.exports=fO});var pO=b((exe,k3)=>{ ``` ### 13. High: Obfuscated Payload Loader - **Category:** Source - **Confidence:** 86.0% - **Path:** index.js - **Public source:** [View source]() Source contains an obfuscated payload loader that reconstructs and executes hidden code. Public source snippet (untrusted): ```javascript L1: "use strict";var MK=Object.create;var xu=Object.defineProperty;var UK=Object.getOwnPropertyDescriptor;var jK=Object.getOwnPropertyNames;var HK=Object.getPrototypeOf,WK=Object.proto... L2: `);let s;for(;(s=XK.exec(l))!=null;){let r=s[1],f=s[2]||"";f=f.trim();let h=f[0];f=f.replace(/^(['"`])([\s\S]*)\1$/mg,"$2"),h==='"'&&(f=f.replace(/\\n/g,` L3: `),f=f.replace(/\\r/g,"\r")),o[r]=f}return o}u(e5,"parse");function t5(a){a=a||{};let o=UR(a);a.path=o;let l=dt.configDotenv(a);if(!l.parsed){let h=new Error(`MISSING_DATA: Cannot ... L4: `)||a.includes("\r")||a.includes("\0"))===!1}u(p2,"isValidHeaderValue");function AZ(a){let o=(a.headersList.get("referrer-policy",!0)??"").split(","),l="";if(o.length)for(let s=o.l... ... L45: L46: ${o.format(l)}`.trim())}};O3.exports=fO});var pO=b((exe,k3)=>{ ``` ### 14. Critical: Remote Response Code Execution - **Category:** Source - **Confidence:** 98.0% - **Path:** index.js - **Public source:** [View source]() Source passes code obtained from a remote response into a dynamic execution sink. Public source snippet (untrusted): ```javascript L1: "use strict";var MK=Object.create;var xu=Object.defineProperty;var UK=Object.getOwnPropertyDescriptor;var jK=Object.getOwnPropertyNames;var HK=Object.getPrototypeOf,WK=Object.proto... L2: `);let s;for(;(s=XK.exec(l))!=null;){let r=s[1],f=s[2]||"";f=f.trim();let h=f[0];f=f.replace(/^(['"`])([\s\S]*)\1$/mg,"$2"),h==='"'&&(f=f.replace(/\\n/g,` L3: `),f=f.replace(/\\r/g,"\r")),o[r]=f}return o}u(e5,"parse");function t5(a){a=a||{};let o=UR(a);a.path=o;let l=dt.configDotenv(a);if(!l.parsed){let h=new Error(`MISSING_DATA: Cannot ... L4: `)||a.includes("\r")||a.includes("\0"))===!1}u(p2,"isValidHeaderValue");function AZ(a){let o=(a.headersList.get("referrer-policy",!0)??"").split(","),l="";if(o.length)for(let s=o.l... ... L45: L46: ${o.format(l)}`.trim())}};O3.exports=fO});var pO=b((exe,k3)=>{ ``` ### 15. High: Cross File Remote Execution Context - **Category:** Source - **Confidence:** 72.0% - **Path:** cli.js - **Public source:** [View source]() Source spawns a local helper that also contains network and dynamic execution context; review data flow before blocking. Public source snippet (untrusted): ```javascript Cross-file remote execution chain: cli.js spawns checksumlib.js; helper contains network access plus dynamic code execution. L1: "use strict";var cX=Object.create;var xs=Object.defineProperty;var lX=Object.getOwnPropertyDescriptor;var uX=Object.getOwnPropertyNames;var sX=Object.getPrototypeOf,fX=Object.proto... L2: `);let s;for(;(s=IX.exec(l))!=null;){let i=s[1],f=s[2]||"";f=f.trim();let g=f[0];f=f.replace(/^(['"`])([\s\S]*)\1$/mg,"$2"),g==='"'&&(f=f.replace(/\\n/g,` L3: `),f=f.replace(/\\r/g,"\r")),o[i]=f}return o}u(OX,"parse");function CX(a){a=a||{};let o=L_(a);a.path=o;let l=Ct.configDotenv(a);if(!l.parsed){let g=new Error(`MISSING_DATA: Cannot ... L4: `)||a.includes("\r")||a.includes("\0"))===!1}u(lF,"isValidHeaderValue");function Fne(a){let o=(a.headersList.get("referrer-policy",!0)?? ``` ### 16. 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){UO(o);let l=this.#d(o);return l?{body:l.body?Buffer.from(l.body.buffer,l.body.byteOffset,l.body.byteLength):void 0,statusCode:l.statusCode,statusM... L131: ${h}`;return}if(qg(o,r,Fse)){Mse(o,f)&&(l.retry=o.toString("utf8",f));return}if(qg(o,r,_se)){Use(o,f)&&(l.id=o.toString("utf8",f));return}if(qg(o,r,Lse)){let h=o.toString("utf8",f)... ... L133: `);a.stack=l?`${l} L134: ${f}`:r.stack}u(S4,"appendFetchStackTrace");U.exports.fetch=u(function(o,l=void 0){return bfe(o,l).catch(s=>{throw I4?S4(s,I4):s&&typeof s=="object"&&Error.captureStackTrace(s,U.ex... L135: `);return I.substr(0,I.length-2)},this.getRequestHeader=function(I){return typeof I=="string"&&n[I]?n[I]:""},this.send=function(I){if(th ``` ### 17. 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){UO(o);let l=this.#d(o);return l?{body:l.body?Buffer.from(l.body.buffer,l.body.byteOffset,l.body.byteLength):void 0,statusCode:l.statusCode,statusM... L131: ${h}`;return}if(qg(o,r,Fse)){Mse(o,f)&&(l.retry=o.toString("utf8",f));return}if(qg(o,r,_se)){Use(o,f)&&(l.id=o.toString("utf8",f));return}if(qg(o,r,Lse)){let h=o.toString("utf8",f)... ... L133: `);a.stack=l?`${l} L134: ${f}`:r.stack}u(S4,"appendFetchStackTrace");U.exports.fetch=u(function(o,l=void 0){return bfe(o,l).catch(s=>{throw I4?S4(s,I4):s&&typeof s=="object"&&Error.captureStackTrace(s,U.ex... L135: `);return I.substr(0,I.length-2)},this.getRequestHeader=function(I){return typeof I=="string"&&n[I]?n[I]:""} ``` ### 18. 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) { ``` ### 19. Low: High Entropy Strings - **Category:** Supply Chain - **Confidence:** 55.0% Package source contains high-entropy string patterns. ### 20. Low: Url Strings - **Category:** Supply Chain - **Confidence:** 65.0% Package source contains URL literals. ### 21. 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. ### 22. 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 ``` ### 23. Medium: Secret Pattern - **Category:** Secrets - **Confidence:** 75.0% - **Path:** checksum-root/checksum.config.ts - **Public source:** [View source]() Hardcoded password in checksum-root/checksum.config.ts Public source snippet (untrusted): ```typescript patternName = generic_password severity = medium line = 44 ``` ## 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 0.35.3 (Dependency) - sucrase 3.35.1 (Dependency) - typescript ^5.0.0 (Dependency) - undici 8.10.0 (Dependency) ## Package metadata - **Package:** @checksum-ai/runtime - **Ecosystem:** npm - **Version:** 5.3.0 - **License:** ISC - **Version published:** 2026-09-13T01:45:38.848Z - **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:** 7,914,564 bytes - **Artifact signatures:** 2 - **Attestations:** No ## References - [HTML security report]() - [Repository]() - [Homepage]() - [Issues]()