--- title: Google Protocol Buffers flaw turns schemas into shells description: Cyera researchers disclosed six CVEs in protobuf.js, a JavaScript Protocol Buffers library with over 50 million weekly downloads. The most critical flaw... canonical: https://daily.dev/posts/google-protocol-buffers-flaw-turns-schemas-into-shells-ssmnskxpa twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Google Protocol Buffers flaw turns schemas into shells | daily.dev og:description: Cyera researchers disclosed six CVEs in protobuf.js, a JavaScript Protocol Buffers library with over 50 million weekly downloads. The most critical flaw... og:url: https://daily.dev/posts/google-protocol-buffers-flaw-turns-schemas-into-shells-ssmnskxpa og:image: https://api.daily.dev/og/posts/sSMnsKxPA.png og:image:alt: Google Protocol Buffers flaw turns schemas into shells og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Google Protocol Buffers flaw turns schemas into shells **[CSO Online](https://daily.dev/sources/csoonline)** · 4 min read · 8 upvotes · 0 comments ## Summary Cyera researchers disclosed six CVEs in protobuf.js, a JavaScript Protocol Buffers library with over 50 million weekly downloads. The most critical flaw (CVE-2026-44291) allows attackers to manipulate schema-derived data so it becomes executable code via JavaScript's Function() constructor, enabling remote code execution within Node.js processes. A separate CLI tool vulnerability (CVE-2026-44295) lets crafted schema names inject code into generated JavaScript files. Additional bugs cover prototype injection and denial-of-service conditions. Because protobuf.js is frequently pulled in as a transitive dependency through gRPC tooling and Google Cloud libraries, many organizations may be unknowingly exposed. Patches are available in protobuf.js 7.5.6 and 8.0.2, and protobuf.js-cli 1.2.1 or 2.0.2. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Critical flaw in Protobuf library enables JavaScript code execution](https://daily.dev/posts/critical-flaw-in-protobuf-library-enables-javascript-code-execution-1jn7mj8hc) · BleepingComputer · 7 upvotes · 1 comments --- Tags: [#security](https://daily.dev/tags/security), [#javascript](https://daily.dev/tags/javascript) [View this post on daily.dev](https://daily.dev/posts/google-protocol-buffers-flaw-turns-schemas-into-shells-ssmnskxpa) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Google Protocol Buffers flaw turns schemas into shells","url":"https://daily.dev/posts/google-protocol-buffers-flaw-turns-schemas-into-shells-ssmnskxpa","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/google-protocol-buffers-flaw-turns-schemas-into-shells-ssmnskxpa"},"datePublished":"2026-06-08T12:24:01.133Z","dateModified":"2026-08-24T06:56:13.332Z","description":"Cyera researchers disclosed six CVEs in protobuf.js, a JavaScript Protocol Buffers library with over 50 million weekly downloads. 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