Prompt-Injection

GhostSplice MCP Attack Splits Prompts to Exfiltrate SSH Keys

ATLAS OWASP HIGH ▲ 8.5 The Hacker News Aug 16, 2026

ASSET Research Group has disclosed GhostSplice, a technique that fragments malicious instructions across multiple Model Context Protocol (MCP) server channels to evade AI coding assistant safety filters and trigger secret exfiltration. By splitting a theft request into individually innocuous pieces placed in tool descriptions and tool results, the attack raised average model compliance from 42% to 82% across eleven tested models. The research highlights that host-side safety controls matter as much as model-level refusals, with the same model behaving differently across coding clients.

Context Bombing Uses Prompt Injection to Stop AI Hacking Agents

ATLAS OWASP MEDIUM ▲ 7.8 Schneier on Security Aug 14, 2026

Researchers at Tracebit have demonstrated a defensive technique called 'context bombing,' which plants prompt injections alongside cloud secrets on AWS to halt AI-driven attack agents by triggering their own guardrails. The approach reportedly reduced admin escalation attempts from 57% to 5% in testing, representing a novel inversion of the prompt injection threat. However, the technique's effectiveness is limited to LLMs with active guardrails, leaving a growing class of ungoverned, locally-run models unaffected.

LLM Reasoning Trace Theft via Encrypted Block Replay Attack

ATLAS OWASP HIGH ▲ 8.5 Simon Willison Aug 12, 2026

Researchers discovered that Anthropic, OpenAI, and Google share the same encryption key across model families for encrypted chain-of-thought blocks, allowing adversaries to replay stronger model reasoning traces into weaker siblings and extract hidden reasoning in plaintext via jailbreak. The attack also enables a prompt injection variant where malicious instructions embedded in reasoning traces are treated as trusted by the model, dramatically increasing attack success rates. All three vendors have since patched the vulnerability following responsible disclosure.

GhostJacking Attack Hijacks AI Agents via Security Alerts

ATLAS OWASP HIGH ▲ 8.2 Dark Reading Aug 11, 2026

New research dubbed 'GhostJacking' demonstrates how attackers can exploit security alerts and blocked events to manipulate and hijack AI agents, exposing fundamental identity governance gaps in agentic AI systems. The technique highlights how defensive signals—normally indicators of protection—can be weaponised to subvert agent behaviour and assume control of automated workflows. This finding has significant implications for enterprises deploying AI agents in sensitive or privileged operational contexts.

Anthropic Enables Claude Code Auto Mode by Default for Pro Users

FIRST LOOK ATLAS OWASP MEDIUM ▲ 6.8 TechCrunch AI Aug 10, 2026

Anthropic is enabling auto mode as the default for Claude Code on Pro, Max, and Team accounts starting August 14, allowing the agent to proceed autonomously unless an action is deemed irreversible, destructive, or out-of-scope. The move addresses a well-documented defender gap — human approval fatigue in agentic pipelines — backed by testing data showing auto mode caught 89% of harmful actions versus 13.6% under manual review. Residual maturity questions remain around enterprise-level customisation of hard deny rules, integration with existing security tooling, and auditability of autonomous decisions at scale.

Cloudflare Launches Kitesurf, a Cloud Browser Built for AI Agents

FIRST LOOK ATLAS OWASP MEDIUM ▲ 6.5 TechCrunch AI Aug 08, 2026

Cloudflare has released Kitesurf, a cloud-hosted browser built specifically for AI agents, running on its serverless Workers platform and designed to handle the unique demands of agentic web navigation at scale. For defenders, this represents a meaningful consolidation point: rather than every development team rolling their own browser infrastructure with inconsistent security postures, Kitesurf offers a managed, observable layer through which agentic web activity can flow. Residual gaps remain around the operational maturity of prompt injection defences and the depth of auditing and policy controls available to enterprise security teams evaluating agentic browser sessions.

Atlassian Rovo Prompt Injection Leaks Jira Data to Attackers

ATLAS OWASP HIGH ▲ 8.5 The Hacker News Aug 08, 2026

Two independent security firms discovered that Atlassian's Rovo AI assistant can be manipulated through indirect prompt injection to exfiltrate Jira and Confluence data to attacker-controlled servers. PromptArmor demonstrated a file-borne injection chain requiring no separate approval step, while Varonis uncovered a URL parameter flaw (RovoBlast) that preloads attacker instructions into Rovo Chat with a single authenticated click. The link-parameter vulnerability was patched server-side by Atlassian on July 8, 2026, but the content-borne injection path lacks a direct patch.

Claude and ChatGPT Hijacked via Zero-Click Prompt Injection

ATLAS OWASP CRITICAL ▲ 9.0 SecurityWeek Aug 07, 2026

Zenity researchers disclosed a zero-click attack chain capable of hijacking Claude and ChatGPT's agentic browser capabilities through malicious content embedded in emails and X posts. The vulnerabilities, reported to Anthropic and OpenAI in late 2025 and early 2026, remain unpatched as of publication. This represents a significant escalation in prompt injection risk, as no user interaction is required to trigger malicious AI agent behaviour.

Varonis Launches Agent IBAC to Constrain AI Agent Actions at Runtime

FIRST LOOK ATLAS OWASP MEDIUM ▲ 7.2 BleepingComputer Aug 05, 2026

Varonis has released Agent Intent-Based Access Control (IBAC) within its Atlas platform, a runtime enforcement layer that compares an AI agent's received instructions against its actual tool calls and data access to detect and block out-of-policy behaviour. While the capability is a defensive control, its deployment introduces new attack surface: adversaries who understand the intent-matching logic may craft prompt injections or instruction manipulation that causes the agent's declared intent to align with a malicious action, bypassing the guardrail. Security teams should treat Agent IBAC as a layer within a defence-in-depth strategy rather than a standalone control, and test it aggressively against adversarial prompt scenarios before trusting it in production.

Sprocket Launches AI Agent for Hardware and Software Dev

FIRST LOOK ATLAS OWASP MEDIUM ▲ 6.2 HN AI Security Aug 03, 2026

Sprocket is an open-source AI agent that combines software code generation with hardware design synthesis, retrieving live web context to augment its outputs across both domains. This dual-domain agentic capability significantly expands the attack surface by introducing a single agent with write access to both software repositories and hardware description files, creating cross-domain compromise scenarios. Defenders must assess supply chain integrity across both EDA toolchains and software build pipelines, as a compromised or manipulated Sprocket instance could introduce vulnerabilities into hardware designs and software simultaneously.

CrowdStrike Falcon AIDR Adds Coverage for Copilot Studio and Claude Code

FIRST LOOK ATLAS OWASP HIGH ▲ 7.2 CrowdStrike Blog Aug 02, 2026

CrowdStrike has extended its Falcon AI Detection and Response (AIDR) capability to cover Microsoft Copilot Studio agents and Anthropic Claude Code, bringing behavioural monitoring to two fast-growing agentic AI surfaces. This expansion signals that enterprises are actively deploying autonomous agents in production environments that previously lacked dedicated security tooling. Defenders now have a detection layer for these platforms, but the expanded integration surface also introduces new ingestion and telemetry trust boundaries that adversaries may probe.

Microsoft Copilot Super App Merges Chat, Code, and Agents

FIRST LOOK ATLAS OWASP HIGH ▲ 7.2 The Verge AI Jul 30, 2026

Microsoft has confirmed a Copilot 'super app' launching in 2026 that consolidates chat, GitHub Copilot coding, Cowork collaboration, and agentic Autopilot capabilities into a single unified platform spanning consumer and commercial users. The convergence of these surfaces into one application dramatically expands the blast radius of any successful prompt injection or account compromise, as an attacker who subverts the LLM layer could pivot across coding pipelines, autonomous task execution, and business workflows simultaneously. Defenders should treat this consolidation as a significant privilege-escalation risk, where a single vulnerability in the AI layer now potentially unlocks lateral movement across the entire Microsoft productivity stack.

Meta Plans Billions of Personal AI Agents on WhatsApp

FIRST LOOK ATLAS OWASP HIGH ▲ 7.8 TechCrunch AI Jul 30, 2026

Meta CEO Mark Zuckerberg has publicly committed to deploying personal AI agents at billion-user scale within five years, with WhatsApp and Meta's messaging surfaces as the primary delivery channel for agents managing finances, health, relationships, and household tasks. This represents a massive expansion of agentic AI attack surface, as persistent, goal-directed agents operating 24/7 on behalf of individuals will hold unprecedented access to sensitive personal data and actionable context. Defenders must anticipate new classes of prompt injection, data exfiltration, and agent impersonation threats operating at a scale and intimacy that dwarfs current enterprise agentic deployments.

Meta Launches Enterprise AI Agents and API Services for Business

FIRST LOOK ATLAS OWASP MEDIUM ▲ 5.5 TechCrunch AI Jul 30, 2026

Meta is expanding into enterprise AI by offering business-facing AI agents, APIs, internal productivity tools, and compute-as-a-service to external customers. This shift introduces new attack surfaces as Meta's AI agents integrate into customer-facing messaging workflows and enterprise tooling pipelines. Defenders should assess risks around prompt injection via business messaging channels, third-party API trust boundaries, and the security posture of Meta-sourced compute and tooling.

Perplexity Launches Personal Computer AI Agent for Windows PCs

FIRST LOOK ATLAS OWASP HIGH ▲ 8.2 The Verge AI Jul 29, 2026

Perplexity has expanded its Personal Computer agentic tool to Windows, enabling a locally-run AI agent that can access files, Office 365 apps, and the web on behalf of enterprise users. This significantly expands the attack surface for defenders: a compromised or manipulated agent running with local system access can exfiltrate files, execute unauthorised actions, and pivot across cloud-connected Microsoft 365 services. Security teams should treat this as a high-privilege process requiring the same scrutiny as endpoint detection tools, with particular attention to prompt injection via locally-processed documents.

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