This Week in AI Security - 2nd July 2026

A lighter week on volume, which gives Jeremy room to go deeper on a set of stories that all reinforce trends we've been tracking for months. The through-line: prompts keep showing up in places nobody thinks to inspect, AI development tooling keeps proving to be a soft target, and the infrastructure around AI is becoming a first-class attack surface. Plus an update on the US government's limited release of Anthropic's Mythos model, and a fresh Five Eyes warning that the cyber risk timeline is measured in months, not years.

Key Episode Highlights

GuardFall: research from Versa showing a prompt-injection technique that defeats 10 of the 11 most popular open source coding and computer-use agents (Cline, Goose, Aider, Roo Code, OpenHands, and others) using basic bash obfuscation. Roughly 548,000 combined GitHub stars across the affected tools.
Amazon Q auto-load flaw: Wiz found the tool auto-loads an amazonq/mcp.json file from cloned repos with no prompt, consent, or workspace-trust check, opening a path to arbitrary code execution.
Perplexity typosquat: Microsoft Defender uncovered a malicious "Search for Perplexity.ai" extension that captured every keystroke in the address bar and routed it to perplexity-ai.online. AI chat-skimming extensions total roughly 900,000 installs across 20-plus enterprise networks.
Langflow RCE: a new critical CVE enabling remote code execution and arbitrary Python on exposed instances. Trend Micro documented a 19-day campaign deploying Monero crypto miners.
Mythos, unblocked (with limits): the US government has lifted its export-control block on Anthropic's Mythos 5 release, though the exact terms remain fuzzy.
Five Eyes warning: a joint NSA, GCHQ, and allied-agency statement that frontier AI will accelerate the speed, scale, and sophistication of cyber threats, with Bruce Schneier arguing in The Guardian that AI decouples skill from ability.

Episode Links -

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