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  "title": "OpenAI on Tech: “During this red-teaming exercise, we also found a vulnerabil…”",
  "description": "During this red-teaming exercise, we also found a vulnerability that allows for unauthenticated remote code execution in… — 6.9K likes, 996 reposts on X.",
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      "id": "2113766354386084338",
      "url": "https://x.com/OpenAI/status/2113766354386084338",
      "text": "During this red-teaming exercise, we also found a vulnerability that allows for unauthenticated remote code execution in Brotli, a widely-deployed compression library included in many pieces of software such as Node.js, Bun, and Envoy. The flaw could let an attacker run their own code on affected systems by sending or replying with malicious compressed data, without any need to create a user account. That is, an unpatched server that accepts compressed input could be taken over by a malicious client, and an unpatched client that accepts compressed input (such as “curl --compressed”) could be taken over by a malicious server. This root cause issue was actually fixed in the Brotli source code in February, but it wasn’t known at the time that it gave rise to a security vulnerability and there was no more recent release of Brotli. Since Brotli is built into other software, any software which includes this library needs to take the update too, followed by the users of that software. We disclosed the vulnerability to Brotli and other downstream projects such as Node.js, which released or are currently releasing security updates, and Brotli cut new release versions and published a CVE. More details on the patch and mitigations below: https://t.co/Y1Y72aHxrW",
      "author": "OpenAI",
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      "createdAt": "Fri Oct 23 22:55:45 +0000 2026",
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      "title": "Brotli vulnerability and AI-assisted security audits",
      "summary": "@OpenAI says a red-teaming exercise found an unauthenticated remote code execution flaw in Brotli, a compression library used in Node.js, Bun and Envoy. It says Brotli cut new releases and published a CVE, and downstream projects are updating. It posted 6.9K likes and 2.0M views. @jurbed recommends Cloudflare's security audit skill, saying to run it on all software, even with free models, for 8.7K likes.",
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  "analysis_md": "During this red-teaming exercise, we also found a vulnerability that allows for unauthenticated remote code execution in Brotli, a widely-deployed compression library included in many pieces of software such as Node.js, Bun, and Envoy. The flaw could let an attacker run their own code on affected systems by sending or replying with malicious compressed data, without any need to create a user account. That is, an unpatched server that accepts compressed input could be taken over by a malicious client, and an unpatched client that accepts compressed input (such as “curl --compressed”) could be taken over by a malicious server. This root cause issue was actually fixed in the Brotli source code in February, but it wasn’t known at the time that it gave rise to a security vulnerability and there was no more recent release of Brotli. Since Brotli is built into other software, any software which includes this library needs to take the update too, followed by the users of that software. We disclosed the vulnerability to Brotli and other downstream projects such as Node.js, which released or are currently releasing security updates, and Brotli cut new release versions and published a CVE. More details on the patch and mitigations below: https://t.co/Y1Y72aHxrW\n\nEngagement: 6.9K likes, 996 reposts, 495 replies, 2.0M views. Author: @OpenAI (verified), 5.5M followers.\n\n## Conversation: Brotli vulnerability and AI-assisted security audits\n\n@OpenAI says a red-teaming exercise found an unauthenticated remote code execution flaw in Brotli, a compression library used in Node.js, Bun and Envoy. It says Brotli cut new releases and published a CVE, and downstream projects are updating. It posted 6.9K likes and 2.0M views. @jurbed recommends Cloudflare's security audit skill, saying to run it on all software, even with free models, for 8.7K likes.",
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