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Writer AI Session Token Leak Enables Account Takeover

ATLAS OWASP CRITICAL ▲ 9.2 The Hacker News Jul 08, 2026

A critical vulnerability dubbed WriteOut in the Writer enterprise AI platform allowed attackers to hijack victim session tokens across organisational boundaries using a malicious agent preview link. The flaw exploited Writer's live preview sandbox, which incorrectly forwarded authenticated session cookies into attacker-controlled execution environments. Writer has patched the issue by isolating sandbox origins and stripping session cookies from preview requests.

Tencent Releases Hy3 295B Open-Source Model with 256K Context

FIRST LOOK ATLAS OWASP MEDIUM ▲ 5.5 Simon Willison Jul 07, 2026

Tencent has released Hy3, a 295B-parameter Mixture-of-Experts open-source model under Apache 2.0, featuring 256K context length and temporarily available for free inference via OpenRouter. The model's large context window, open weights, and Chinese provenance expand the attack surface for defenders managing LLM supply chains, jailbreak campaigns, and influence operations. Security teams should treat this as another high-capability open-weight model requiring the same scrutiny applied to comparable releases from Mistral or Meta.

NVIDIA and Hugging Face Launch GR00T 1.7 Robot Model

FIRST LOOK ATLAS OWASP HIGH ▲ 7.8 NVIDIA AI Blog Jul 07, 2026

NVIDIA and Hugging Face have integrated the Isaac GR00T 1.7 vision-language-action model, Isaac Teleop framework, and a 350,000-trajectory open dataset into the LeRobot open-source robotics library, creating an end-to-end open pipeline for training and deploying physical AI systems. This dramatically lowers the barrier to fine-tuning and deploying robot foundation models, expanding the attack surface across the full ML supply chain — from poisoned community datasets to adversarially crafted demonstrations used in teleop data collection. Defenders responsible for robotics deployments must now contend with a large, loosely governed open-source ecosystem where compromised models or datasets can directly translate to unsafe physical-world behaviour.

AWS Launches Multi-Turn RL for Amazon Nova

FIRST LOOK ATLAS OWASP HIGH ▲ 7.2 AWS Machine Learning Blog Jul 07, 2026

AWS has released a production-grade, event-driven multi-turn reinforcement learning training infrastructure for Amazon Nova models on SageMaker HyperPod, enabling enterprises to train agents that learn tool orchestration, error recovery, and sequential decision-making at scale. This materially expands the attack surface by introducing complex reward-routing pipelines, ephemeral compute provisioning, and environment-facing reward workers as new targets for poisoning and manipulation. Defenders must scrutinise the trust boundaries between the Nova Forge SDK, ECS reward workers, and HyperPod training pods, as a compromised reward signal can silently shape model behaviour across entire interaction sequences.

OfficeCLI Brings Microsoft Office Automation to AI Agents

FIRST LOOK ATLAS OWASP HIGH ▲ 7.8 HN AI Security Jul 07, 2026

OfficeCLI is an open-source, single-binary tool that enables AI agents to programmatically read, write, and automate Microsoft Word, Excel, and PowerPoint files without requiring a local Office installation. This dramatically expands the file-system attack surface for agentic AI systems, enabling prompt injection via document content, automated exfiltration of sensitive Office files, and weaponisation of documents as a persistent injection vector. Defenders operating AI agent pipelines that touch file systems must now treat any Office document as a potential adversarial input channel.

SkillCloak Bypasses AI Agent Skill Scanners at 90% Rate

ATLAS OWASP HIGH ▲ 8.5 The Hacker News Jul 07, 2026

Researchers at Hong Kong University of Science and Technology have demonstrated that static scanners used to vet malicious AI agent 'skills' — modular add-ons for agents like Claude Code and OpenAI Codex — can be systematically bypassed using a tool called SKILLCLOAK. The technique leverages either character-substitution obfuscation or self-extracting packing into scanner-ignored directories like .git/, achieving evasion rates above 90% across all eight tested scanners. The same research team also developed SKILLDETONATE, a runtime behavioral sandbox that catches most of the threats static analysis misses.

Agentjacking: Prompt Injection via Malicious Bug Reports

ATLAS OWASP HIGH ▲ 8.2 Dark Reading Jul 04, 2026

A technique dubbed 'agentjacking' exploits the inability of AI coding agents to distinguish between legitimate content and embedded instructions, allowing attackers to hijack agent behaviour through maliciously crafted bug reports. The attack represents a scalable, low-barrier prompt injection vector targeting developer workflows that rely on autonomous AI agents. As AI coding assistants gain broader adoption and elevated system permissions, this class of attack poses a significant risk to software supply chain integrity.

Cursor IDE DuneSlide Zero-Click Prompt Injection RCE

ATLAS OWASP CRITICAL ▲ 9.2 SecurityWeek Jul 04, 2026

A set of vulnerabilities dubbed 'DuneSlide' in the Cursor AI code editor allow attackers to conduct zero-click prompt injection attacks that escape the application's sandbox and execute arbitrary code at the operating system level. The flaws represent a critical escalation of AI-native attack surface risks, targeting developers who rely on AI-assisted coding environments. Because exploitation requires no user interaction, the attack chain is particularly dangerous in supply chain and watering-hole scenarios.

Current AI Launches Open Source AI Gap Map with 421 Projects

FIRST LOOK ATLAS OWASP MEDIUM ▲ 5.5 Simon Willison Jul 04, 2026

Current AI has published the Open Source AI Gap Map v0.1, a structured, MIT-licensed index of 421 open-source AI products spanning models, datasets, software tools, and hardware, backed by 1,184 YAML files and tracking over 16,000 GitHub repositories. For defenders, this comprehensive public inventory creates a dual-use intelligence resource: while it aids supply chain visibility, it simultaneously provides adversaries with a curated, machine-readable attack surface map of the open-source AI ecosystem. Security teams should treat this dataset as threat-actor recon material and cross-reference their own AI dependencies against it immediately.

Browser Ransomware via File System Access API: DeepSeek

ATLAS OWASP HIGH ▲ 8.5 Check Point Research Jul 03, 2026

Check Point Research demonstrates how DeepSeek's lower refusal rates allowed researchers to transform an LLM-hallucinated malware concept into a practical browser-native ransomware technique targeting Android photo directories via the File System Access API. The attack requires no native payload, APK installation, or root access — only social engineering to obtain a legitimate browser permission prompt. This research highlights how frontier AI models with weaker safety controls can independently design novel attack paths not yet seen in real-world campaigns.

CVE-2026-50548: Cursor IDE Prompt Injection RCE

ATLAS OWASP CRITICAL ▲ 9.2 The Hacker News Jul 03, 2026

Two critical vulnerabilities (CVE-2026-50548 and CVE-2026-50549) in the Cursor AI code editor allow prompt injection attacks delivered via MCP services or web search results to escape the editor's terminal sandbox and execute arbitrary commands on a developer's machine without any user interaction. Both flaws abuse the sandbox's write-permission logic — one through a misconfigured working directory parameter, the other through a symlink-resolution fallback — ultimately allowing overwrite of the sandbox helper binary itself. The attack surface is significant given Cursor's reported adoption across more than half of Fortune 500 companies; all versions prior to 3.0 remain vulnerable.

Anthropic Releases Claude-Real-Video for Local Video Analysis

FIRST LOOK ATLAS OWASP MEDIUM ▲ 6.8 HN AI Security Jul 03, 2026

claude-real-video is an open-source, MIT-licensed Python library that extracts scene-change frames, deduplicates images, and transcribes audio from any video URL or local file, then packages the result as a folder any LLM can consume — all processed locally without cloud upload. For defenders, this dramatically expands the multimodal prompt injection surface by enabling adversaries to embed malicious instructions inside video content that LLM pipelines will now ingest and act upon. Security teams building or deploying LLM agents with video-processing capabilities must treat video content as an untrusted, potentially adversarial input channel.

Claude Opus Discovers API Flaw Enabling Ticket Fraud

ATLAS OWASP HIGH ▲ 8.2 Wired Security Jul 03, 2026

Security researcher Ian Carroll leveraged Anthropic's Claude Opus 4.7 to identify a critical vulnerability in Front Gate Tickets—a Live Nation subsidiary handling ticketing for major US festivals—that granted super-administrator access and the ability to freely issue tickets of any value. The case demonstrates LLM-assisted autonomous vulnerability discovery at scale, with Carroll noting the AI could likely have completed the full exploit chain without human intervention. Front Gate patched the flaw within 24 hours of disclosure, confirming no evidence of prior exploitation.

Anthropic Releases Mythos and Fable Models with Global Access

FIRST LOOK ATLAS OWASP HIGH ▲ 6.8 TechCrunch AI Jul 01, 2026

The US government has lifted export restrictions on Anthropic's Mythos and Fable models, restoring broad international access to what are described as the most capable AI models publicly available, with Mythos specifically noted for its advanced ability to identify and exploit software vulnerabilities. Defenders must now contend with a significantly wider pool of threat actors — including foreign nationals and nation-state-affiliated researchers — who can access a model with documented offensive security capabilities. The policy reversal also introduces regulatory uncertainty that complicates enterprise risk assessments, as organizations cannot rely on stable governance signals to calibrate their AI security postures.

CVE-2026-43715: Apple WebKit Memory Corruption Flaw

ATLAS OWASP HIGH ▲ 7.2 The Hacker News Jun 30, 2026

Apple patched over 30 vulnerabilities across iOS, macOS, and Safari, with four WebKit flaws credited to AI-assisted discovery by OpenAI Codex Security and Anthropic researchers using Claude. The disclosure marks a notable shift in AI's role in offensive and defensive security research, with Apple explicitly citing AI-accelerated exploit development as the reason for expediting its patch release timeline. This represents a concrete, documented instance of AI tooling being used to find memory corruption and use-after-free vulnerabilities in a major browser engine.

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