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Category — Sandbox Security
Isolated-vm Flaw Lets Sandboxed JavaScript Escape to Host for Potential RCE

Isolated-vm Flaw Lets Sandboxed JavaScript Escape to Host for Potential RCE

Aug 20, 2026 Vulnerability / Application Security
Cybersecurity researchers have disclosed a critical security flaw in isolated-vm , a popular open-source sandbox with more than 2,900 stars and 190 forks on GitHub, that could allow attackers to escape the confines of the isolated environment. The vulnerability (" GHSA-864f-rcv7-6rh4 "), which has yet to be assigned a CVE identifier, impacts all versions of the library before and including 7.0.0. It has been patched in versions 6.2.0 and 7.0.1 released earlier this month. Isolated-vm is a Node.js library for running untrusted JavaScript inside a V8 Isolate , an independent instance of the Google V8 JavaScript engine, allowing multiple sandboxed JavaScript environments to run concurrently without sharing data or interfering with each other. The npm package has witnessed nearly 1 million downloads over the past week. Because each V8 Isolate has a separate state and maintains its own heap, it is not possible to directly pass JavaScript objects from the main Node.js threa...
Writer AI Flaw Could Let Agent Previews Leak Session Tokens Across Tenants

Writer AI Flaw Could Let Agent Previews Leak Session Tokens Across Tenants

Jul 07, 2026 AI Security / Vulnerability
Cybersecurity researchers have disclosed details of a now-patched critical session isolation vulnerability in Writer , an enterprise generative artificial intelligence (AI) platform, that could result in cross-tenant compromise. The one-click vulnerability has been codenamed WriteOut by the Sand Security Research team. "An outsider could go from having no access to taking over any Writer AI organization inside industry-leading enterprises, with nothing more than a link," the cybersecurity company said in a report shared with The Hacker News. Put differently, the shortcoming could be abused to take over a victim's Writer account, and use it to access private chats, documents, and other sensitive data related to agents, configurations, private models, connectors, and large language model (LLM) credentials. Even worse, it could be abused to seize administrative control depending on the victim's role. An important aspect of the flaw is that the attacker and the...
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