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AWS Kiro: Arbitrary Code Execution via Indirect Prompt Injection

Researchers disclosed a vulnerability in AWS Kiro, an agentic IDE, where hidden instructions planted in a web page or source file (indirect prompt injection) can make Kiro rewrite its 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 without any approval prompt. Because Kiro can write to these files without user consent, the human-in-the-loop approval boundary is bypassed entirely. Amazon issued CVE-2026-10591 and the flaw is now fixed.

indirect-prompt-injection · tool-abuse · remote-code-execution · supply-chain
ai-agents · mcp · llm · coding-agent · ide

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AWS, Google, and Vercel Agent Flaws Let Attackers Trigger Tools Without Running the Model

Security flaws in agent infrastructure from AWS (Bedrock AgentCore's InvokeHarness API), Google (Agent Development Kit for Python), and Vercel (AI SDK harness packages for Codex and OpenCode) allow untrusted or forged instructions to reach an agent's tools without verifying that a model turn authorized them. In several attack paths the model never ran, so system prompts, content filters, and model-level guardrails never engaged. AWS fixed the managed service, Google addressed the issues in ADK 2.5.0, and Vercel patched @ai-sdk/harness-codex 1.0.29 and @ai-sdk/harness-opencode 1.0.28. Details →

IBM's agentic AI platform is under active attack - patch now

A critical vulnerability, CVE-2026-9198, in IBM-owned low-code AI agent builder Langflow lets unauthenticated attackers achieve remote code execution on default deployments by chaining an auto-login endpoint that mints superuser tokens with a code-validation endpoint that runs arbitrary Python. CISA added it to its Known Exploited Vulnerabilities catalog after confirming active exploitation; IBM says Langflow OSS 1.0.0 through 1.10.0 are affected and urges upgrading to 1.10.1 or later. Sysdig telemetry documents in-the-wild attack chains (including related CVE-2026-33017 RCE and CVE-2026-55255 IDOR) that probe /api/v1/auto_login, enumerate flows, and deliver second-stage loaders. Details →

Paperclip AI Flaws Let Attackers Run Host Commands via Malicious Agent Imports

Two flaws in Paperclip, an open-source control plane for teams of AI agents, let attackers execute host commands by importing and starting a malicious agent. The server-side path CVE-2026-41679 (CVSS 10.0) needs no account or victim interaction against authenticated deployments with default registration, while GHSA-x8hx-rhr2-9rf7 (CVSS 9.6) triggers when a user opens an attacker-controlled page in default local_trusted mode; a third flaw exposed sensitive data via API routes lacking access checks. Version v2026.416.0 adds import-authorization and hostname-validation fixes. Details →

Hugging Face Diffusers Flaws Could Let Model Repositories Execute Arbitrary Code

Zafran Labs disclosed three high-severity flaws, collectively named FaceHugger, in Hugging Face's Diffusers library (CVE-2026-44827 CVSS 8.8, CVE-2026-45804 CVSS 7.5, and CVE-2026-44513 CVSS 8.8) that let a malicious model repository silently execute arbitrary code on any machine loading it. The flaws stem from a Time-of-Check to Time-of-Use race that bypasses the trust_remote_code safeguard by splitting a model download into two non-atomic HTTP requests, so a routine model load becomes an initial-access vector across CI/CD, container, and production pipelines. Details →

LiteLLM AI Gateway: Active Exploitation via MCP Injection – Lab Space

LiteLLM, an open-source AI gateway proxy with roughly 95 million monthly PyPI downloads, is affected by a cascading 2026 vulnerability chain that exposes the aggregated provider API keys it stores. The chain includes a March 2026 PyPI supply-chain compromise attributed to TeamPCP (CVE-2026-33634), a pre-auth SQL injection (CVE-2026-42208) that dumps stored credentials, and a command-injection flaw in LiteLLM's MCP server test endpoints (CVE-2026-42271) chained with a Starlette host-header bypass (CVE-2026-48710) for unauthenticated RCE assessed at CVSS 10.0; CISA added CVE-2026-42271 to its KEV catalog on June 8, 2026 with remediation required by upgrading to v1.83.10-stable. Details →

Mitigate indirect prompt injection risks from Google Cloud MCP | Google Cloud Data Agent Kit extension for Antigravity IDE | Google Cloud Documentation

Google Cloud documentation describes indirect prompt injection risks from the Google Cloud MCP integration in coding agents (VS Code and Antigravity IDE), explaining how agents running with a user's delegated privileges may misinterpret attacker-planted data in email, Cloud Storage, or BigQuery as instructions. It recommends guardrails such as running agents in constrained environments (e.g., Cloud Workstations) with disabled internet access and no root privileges. Details →

Prompt injection protection in Microsoft Defender for Office 365 - Microsoft Defender for Office 365 | Microsoft Learn

Microsoft documentation describes prompt injection protection built into Microsoft Defender for Office 365, which detects attacker-authored instructions embedded in inbound email (body, subject, quoted replies, attachments, or hidden markup) before that content reaches a user or an AI assistant such as Microsoft 365 Copilot. The feature explains indirect prompt injection techniques including direct instructions to the model and hidden/invisible text (white-on-white fonts, zero-size text, HTML/CSS tricks) and detects them as part of existing mail-flow inspection. Details →
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