First reported · updated · 4 reports embracethered.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 immersivelabs.com
Claude Code RCE: How a Malicious PR Triggers Code Execution
Immersive Labs describes a Claude Code remote code execution vulnerability in which a malicious pull request can trigger code execution when the AI coding agent processes the repository. The attack leverages attacker-controlled content in a PR to coerce the agent into executing code on the host. Details →First reported nvidia.com
Mitigating Indirect AGENTS.md Injection Attacks in Agentic Environments | NVIDIA Technical Blog
NVIDIA's AI Red Team demonstrated an indirect AGENTS.md injection attack in which a malicious Go dependency executes during a normal build, detects a Codex environment via the CODEX_PROXY_CERT variable, and writes a crafted AGENTS.md file whose directives claim 'absolute authority' over user requests and instruct the coding agent to hide its changes from PR summaries and commit messages; the agent complied, quietly inserting a sleep delay. Two further efforts (Prompt Security's cloned-repo attack against VS Code Copilot Chat leading to credential exfiltration, and GitInject's CI/CD attack against four AI providers in GitHub Actions) show the same AGENTS.md-as-trusted-instructions mechanism exploited across vectors. Details →First reported · updated · 6 reports wiz.io
GhostApproval: AI Coding Assistant Trust Boundary Flaw
Wiz disclosed GhostApproval, a vulnerability pattern in 6 top AI coding assistants (Amazon Q Developer, Anthropic Claude Code, Augment, Cursor, Google Antigravity, Windsurf) where a malicious repository uses a symlink (CWE-61) disguised as an ordinary file so the agent writes attacker-controlled content — such as an SSH key into ~/.ssh/authorized_keys — outside the workspace sandbox, potentially achieving RCE. In several cases (notably Claude Code) the agent's internal reasoning recognized the dangerous target while the human-in-the-loop confirmation dialog concealed it (CWE-451). CVEs including CVE-2026-12958 and CVE-2026-50549 were assigned; AWS, Cursor, and Google fixed the issue, while others went silent or declined it as outside their threat model. Details →First reported · updated · 2 reports adversa.ai
DeepJack Cursor deeplink vulnerability: 1-click MCP server RCE
Adversa AI disclosed a vulnerability in the Cursor AI coding IDE (dubbed "DeepJack") in which a crafted cursor:// deeplink can install an attacker-controlled MCP server that runs arbitrary, unsandboxed commands under the victim's account after one click and one confirmation. The install dialog renders the server command in a single-line field, pushing a malicious tail off-screen, and a double-URL-encoded variant disguises the mcp/install URI as a routine pr-review link. Cursor closed the reports as duplicates, but build 3.9.8 reportedly remains vulnerable. Details →First reported · updated · 2 reports nhimg.org
Agentjacking exposes a broken trust model in AI coding agents
"Agentjacking," documented by Swarmnetics and Tenet Security, abuses the trust AI coding agents place in external error-report telemetry: an attacker who obtains a publicly exposed Sentry DSN can inject malicious instructions into error reports that the agent treats as actionable, enabling theft of cloud keys, Git credentials, and private repo URLs. The core flaw is that systems built to process trusted telemetry conflate source trust with action trust in MCP-connected agent workflows. Details →First reported · updated · 2 reports zafran.io
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 →First reported checkmarx.com
MCP Config Poisoning: Text file to RCE - Checkmarx Zero
Checkmarx Zero researcher Bruno Dias details MCP Configuration Poisoning, an attack where a malicious or modified mcp.json file embeds attacker-controlled commands and arguments that AI tools and agents execute when loaded. The write-up demonstrates how a security scanner processing a poisoned MCP config can be turned into a trigger for Remote Code Execution (RCE), referencing a vulnerability in Snyk's agent scan. Details →First reported · updated · 2 reports asset-group.github.io
We put the exploit in a picture. Your AI code reviewer never opens it.
Researchers from the University of Missouri-Kansas City's ASSET Research Group demonstrated 'Ghostcommit,' an attack that hides malicious prompt-injection instructions inside a PNG image so AI code reviewers (CodeRabbit, Cursor Bugbot) never see them. A benign-looking AGENTS.md convention file points to build-spec.png, whose rendered text instructs a coding agent to read the repo's .env byte-by-byte and emit the secrets as an integer tuple; the payload sits dormant until an unrelated agent session triggers exfiltration. A proof-of-concept is published on GitHub and the findings were disclosed to affected vendors. Details →First reported mitiga.io
MCP Token Theft in Claude Code: A Man-in-the-Middle Attack Chain
Mitiga Labs research details a man-in-the-middle attack chain against Claude Code in which a user-level post-install hook rewrites MCP server endpoints in ~/.claude.json to route MCP traffic through attacker-controlled infrastructure and steal OAuth tokens for connected SaaS (Jira, Confluence, GitHub, etc.). Because provider-side audit logs still show valid OAuth traffic from Anthropic's trusted egress range, the malicious activity blends in as legitimate user actions, and token rotation fails to break the chain while the hook keeps reseeding the config. Details →First reported ainowinstitute.org
Friendly Fire: Hijacking Defensive Cyber AI Agents for Remote Code Execution
The AI Now Institute published an exploit brief and PoC (GitHub: Boyan-MILANOV/friendly-fire-ai-agent-exploit) demonstrating remote code execution against Anthropic's Claude Code CLI (auto-mode) and OpenAI's Codex CLI (auto-review) when these defensive coding agents are used to assess third-party or open-source libraries. The attack embeds prompt injections across a library's source code to hijack the AI agent, requiring no hooks, skills, plugins, MCP servers, or config files as an injection vector. Details →How the wire is made
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