--- title: Security briefing: June 2026 | daily.dev description: June 2026's security briefing covers several notable incidents and research findings. The French government's Tchap messaging app was breached via social... canonical: https://daily.dev/posts/security-briefing-june-2026-xqmgytnaq twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Security briefing: June 2026 | daily.dev og:description: June 2026's security briefing covers several notable incidents and research findings. The French government's Tchap messaging app was breached via social... og:url: https://daily.dev/posts/security-briefing-june-2026-xqmgytnaq og:image: https://api.daily.dev/og/posts/xQmgytnaq.png og:image:alt: Security briefing: June 2026 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. # Security briefing: June 2026 **[Sysdig Blog](https://daily.dev/sources/sysdig-blog)** · 6 min read · 0 upvotes · 0 comments ## Summary June 2026's security briefing covers several notable incidents and research findings. The French government's Tchap messaging app was breached via social engineering, exposing data from 73,000 accounts. Novo Nordisk suffered a cloud extortion attack by FulcrumSec, which exfiltrated 1.3 TB of data including clinical trial data and AI models after gaining access through exposed credentials. Sysdig's Threat Research Team documented an agentic threat actor performing a fully automated container escape and Kubernetes cluster compromise, attackers jailbreaking LLMs using CTF-framing to generate CVE exploits, and an evolution of LLMjacking toward building autonomous offensive hacking tools. A Langflow CVSS 9.9 IDOR vulnerability was found to be less exploited than a lower-scored RCE, challenging CVSS-based prioritization. Additional news includes the named Cordyceps GitHub Actions abuse pattern, a supply chain breach via Klue affecting LastPass and others, and a new Linux kernel privilege escalation flaw (DirtyClone). ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Security briefing: May 2026](https://daily.dev/posts/security-briefing-may-2026-bwmlv6zor) · Sysdig Blog · 0 upvotes · 0 comments - [23rd February – Threat Intelligence Report](https://daily.dev/posts/23rd-february-threat-intelligence-report-4m6vt9dhh) · Check Point Research · 0 upvotes · 0 comments - [Novo Nordisk Breach Exposes Software Development Pipeline Risk](https://daily.dev/posts/novo-nordisk-breach-exposes-software-development-pipeline-risk-mllmtnmow) · Dark Reading · 0 upvotes · 0 comments --- Tags: [#security](https://daily.dev/tags/security) [View this post on daily.dev](https://daily.dev/posts/security-briefing-june-2026-xqmgytnaq) ```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":"Security briefing: June 2026","url":"https://daily.dev/posts/security-briefing-june-2026-xqmgytnaq","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/security-briefing-june-2026-xqmgytnaq"},"datePublished":"2026-07-07T14:37:15.491Z","dateModified":"2026-07-07T14:37:41.408Z","description":"June 2026's security briefing covers several notable incidents and research findings. 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