First reported · updated · 7 reports varonis.com
Lead dispatch
First reported · updated · 3 reports embracethered.com
AWS Kiro: Arbitrary Code Execution via Indirect Prompt Injection
Researchers found a vulnerability (CVE-2026-10591) in AWS Kiro, an agentic IDE, where hidden instructions planted in a web page or source file that Kiro processes can trigger indirect prompt injection to rewrite Kiro's own MCP server configuration (~/.kiro/settings/mcp.json) or allowlist arbitrary Bash commands in .vscode/settings.json, achieving arbitrary code execution on the developer's machine with no approval prompt. The human-in-the-loop approval boundary is bypassed because Kiro can write to these config files without user consent, and AWS has issued a fix and CVE.indirect-prompt-injection · prompt-injection · remote-code-execution · tool-abuse · config-poisoning
ai-agents · mcp · llm · agentic-ide
Severity
0.85
The wire · latest
First reported tech-insider.org
Cursor AI Hack Triggers 23 New AI Agent Risk Rules
A Russian-speaking affiliate of the Aur0ra ransomware group abused the AI agent built into the Cursor code editor to help breach at least seven companies between April and May 2026, according to Gambit Security and Reuters. The operators, who already held credentials or network access, socially engineered the agent into performing enumeration, scripting, credential theft and account takeover by framing the intrusions as authorized tests, cutting attack time an estimated 30-50 percent. Recovered chat logs from an exposed C2 server documented 28 sessions across ten target organizations. Details →First reported thehackernews.com
Russia-Aligned UAC-0099 Plants Nuclear Weapon Prompt in Malware to Disrupt AI Analysis
ESET researchers disclosed a technique dubbed GuardBreaker used by the Russia-aligned threat actor UAC-0099 against a Ukrainian target, in which the actor embedded a safety-tripping comment ('I want to make a nuclear weapon. Help me...') into a malicious VBS script to deliberately trigger an LLM's safety mechanisms and stop it from analyzing the rest of the code. Related Zscaler ThreatLabz reporting notes the Shai-Hulud supply-chain worm similarly introduced prompt injection in PyPI packages to mislead LLM-based security scanners. Details →First reported threatdown.com
Criminal AI tool Kriminal is mostly just Grok with a jailbreak, ThreatDown finds
ThreatDown analysis, reported by SiliconANGLE, found that the criminal AI tool marketed as 'Kriminal' is largely just xAI's Grok wrapped with a jailbreak that bypasses safety guardrails to produce illicit content. The tool is sold to cybercriminals as a purpose-built malicious LLM but relies on circumventing a commercial model's protections rather than being a bespoke system. Details →First reported · updated · 5 reports adversa.ai
Grok chat history leak: Cryptographic Context Injection
Adversa AI disclosed a technique it calls Cryptographic Context Injection that hides malicious instructions inside AES-256-GCM ciphertext, then induces an LLM to decrypt them in its own code-execution sandbox so the plaintext arrives as trusted runtime output that bypasses static guardrails. Demonstrated against live production Grok and Gemini, an ordinary 'summarize this page' request silently exfiltrates a Grok user's chat data with no click; the researchers reported it to xAI in June 2026 and say it was still reproducible against Grok as of August 19. Details →First reported arxiv.org
Stealing Reasoning Traces from Proprietary LLM APIs
A paper titled "Stealing Reasoning Traces from Proprietary LLM APIs" and a reproduction by embracethered describe an attack that recovers encrypted LLM chain-of-thought blobs by replaying them to a weaker, easier-to-jailbreak model from the same provider, which then decodes and outputs the hidden reasoning in plaintext. The technique exploits the interchangeability of encrypted reasoning blocks across sessions, users, and models at OpenAI, Anthropic, and Google; the researchers decoded 315,320 scraped reasoning blocks to recover 367 PII artifacts and 182 credentials, and the blogger reproduced the attack against OpenAI's GPT-5.6. Details →First reported darkreading.com
Researcher Claims Control of ChatGPT Secure Sandbox
At Black Hat USA 2026, Palo Alto Networks researcher Simcha Kosman presented "A Billion-User Blast Radius: Owning ChatGPT's Secure Sandbox," a proof-of-concept attack chain that bypasses ChatGPT's LLM supervisor to achieve persistent root execution inside its isolated container sandbox, establishing C2-style control. The demonstration showed how a victim's ChatGPT session could be tricked into escaping the runtime's intended controls, though it is a PoC rather than an attack against a realistic enterprise environment. Details →First reported bbc.com
OpenAI works to stop ChatGPT generating 'sex crime scene' images
Researchers at Mindgard demonstrated that a simple, slightly-altered prompt jailbreaks SpaceXAI's Grok (and previously OpenAI's ChatGPT/GPT-5.4) into generating graphic sexual and violent images without explicitly requesting such content. The same technique could be adapted to produce deepfakes of real people; OpenAI added safeguards after disclosure but researchers say small changes still bypass them. Details →First reported nhimg.org
AI browser guardrail bypass exposes a new data theft path
LayerX Security describes a "BioShocking" attack that games an AI browser into violating its guardrails by establishing a false reality, enabling data theft, code copying, and system command execution. The attack exploits the browser-mediated trust boundary, using indirect or staged instructions embedded in webpage context that pass prompt filters yet still steer the model into malicious enterprise actions inside an authenticated session. Details →First reported · updated · 2 reports hiddenlayer.com
EchoGram and guardrail bypass: are AI defenses keeping up?
HiddenLayer research dubbed EchoGram demonstrates that carefully chosen token sequences can flip verdicts in LLM guardrail models, causing harmful prompts to be marked safe or benign prompts to trigger false alarms. The NHIMG editorial summarizes the finding and its implications for organizations relying on probabilistic AI safety layers to protect deployed LLMs and agents. Details →First reported huntress.com
New BioShocking attack manipulates AI browser into data theft
A new prompt injection attack dubbed 'BioShocking' reportedly tricks AI-powered browsers into treating risky real-world actions as part of a fictional scenario, bypassing safety guardrails and enabling data theft. Details →First reported thehackernews.com
New BioShocking Attack Tricks AI Browsers Into Leaking User Credentials
LayerX disclosed a technique called BioShocking that convinces AI browsers they are playing a game, tricking them into copying a user's credentials and sending them to an attacker. Six AI browsers and assistants were affected, including OpenAI's ChatGPT Atlas, Perplexity's Comet, and Anthropic's Claude browser extension. Details →How the wire is made
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