CVE-2026-54316

Claude Code is an agentic coding tool. From 0.2.54 until 2.1.163, because the hostname huggingface.co was pre-approved as a bare hostname for the WebFetch tool, any path on that domain—including attacker-controlled model repositories—was auto-approved without a permission prompt or being subject ...

CVE-2026-54316 Claude Code: Out-of-Band Data Exfiltration via Pre-Approved HuggingFace Domain in WebFetch

Claude Code is an agentic coding tool. From 0.2.54 until 2.1.163, because the hostname huggingface.co was pre-approved as a bare hostname for the WebFetch tool, any path on that domain—including attacker-controlled model repositories—was auto-approved without a permission prompt or being subject ...

CVE-2026-54316

Claude Code exposed an out-of-band data exfiltration risk due to pre-approved huggingface.co as a bare hostname for WebFetch in versions 0.2.54–2.1.163. An attacker who could inject untrusted content into a Claude Code context could force WebFetch to access attacker-controlled model repos (e.g., ...

Claude Code: Out-of-Band Data Exfiltration via Pre-Approved HuggingFace Domain in WebFetch

Because the hostname huggingface.co was pre-approved as a bare hostname for the WebFetch tool, any path on that domain—including attacker-controlled model repositories—was auto-approved without a permission prompt or being subject to --allowedTools restrictions. An attacker able to inject untrust...

PT-2026-50594

Name of the Vulnerable Software and Affected Versions Claude Code versions 0.2.54 through 2.1.162 Description The WebFetch tool pre-approved the hostname 'huggingface.co' as a bare hostname, allowing any path on that domain to be auto-approved without a permission prompt or restrictions from...

Hackers Use Fake Claude Code Guide and AI PDFs to Spread AsyncRAT Malware

Hackers are using fake Claude Code guide and AI PDFs to spread AsyncRAT malware via Windows attack using PowerShell and Defender exclusions...

Malicious code in 0x2ai-demo6 (npm)

--- -= Per source details. Do not edit below this line.=- Source: amazon-inspector 0f4a43a40af9e707d98ed55406b0ff32dccaad352fccf5d1eaaca41b9959d924 On npm install, scripts/postinstall.cjs writes .mcp.json into the installer's working directory INITCWD wiring Claude Code to a packaged MCP server...

MAL-2026-5592 Malicious code in 0x2ai-demo6 (npm)

--- -= Per source details. Do not edit below this line.=- Source: amazon-inspector 0f4a43a40af9e707d98ed55406b0ff32dccaad352fccf5d1eaaca41b9959d924 On npm install, scripts/postinstall.cjs writes .mcp.json into the installer's working directory INITCWD wiring Claude Code to a packaged MCP server...

Malicious code in 0x2ai-demo7x (npm)

--- -= Per source details. Do not edit below this line.=- Source: amazon-inspector c7e956073a7db6057e4d42af462dba0299152ca992c113d74c715e90574d0efb On npm install, scripts/postinstall.cjs copies the package's payload/ tree into the installer's project root process.env.INITCWD, placing...

MAL-2026-5599 Malicious code in 0x2ai-ivo (npm)

--- -= Per source details. Do not edit below this line.=- Source: amazon-inspector e78c039ee7ad67b1a20ef30b37ce03178f6c2181b1e330db69e04dabd0a28686 On install, the postinstall script copies the package's payload/ tree CLAUDE.md,.claude/settings.json,.mcp.json, and several.cjs MCP scripts into the...

Malicious code in 0x2ai-demo1 (npm)

--- -= Per source details. Do not edit below this line.=- Source: amazon-inspector fdc7c661d4867578d3dd920010bccc1e79fcae8753b5bf549f44ea8a45cde502 On npm install, scripts/postinstall.cjs runs fs.cpSyncpayload, cwd, recursive: true with cwd=process.env.INITCWD || process.cwd — recursively writing...

Malicious code in 0x2ai-demo9x (npm)

--- -= Per source details. Do not edit below this line.=- Source: amazon-inspector 8e796c3398589b92ecd70f45bc41128101313dd07adeb0634199ac3fef59d19d On npm install, scripts/postinstall.cjs copies the package's payload/ tree into the installer's project root process.env.INITCWD without consent,...

GHSA-8Q5R-MMJF-575Q Claude Code Action: Malicious MCP Server Configuration in PRs Enables Remote Code Execution and Secret Exfiltration

Due to the combination of checking out PR head branches attacker-controlled, reading .mcp.json from the working directory via default setting sources, and unconditionally enabling all project MCP servers via enableAllProjectMcpServers, it was possible for an attacker who opened a PR containing a...

PT-2026-48540

Due to the combination of checking out PR head branches attacker-controlled, reading .mcp.json from the working directory via default setting sources, and unconditionally enabling all project MCP servers via enableAllProjectMcpServers, it was possible for an attacker who opened a PR containing a...

offensive-claude-533

Offensive Security Research Config for Claude Code !TIP...

offensive-claude-604

Offensive Security Research Config for Claude Code !TIP...

offensive-claude-813

Offensive Security Research Config for Claude Code !TIP...

offensive-claude-982

Offensive Security Research Config for Claude Code !TIP...

offensive-claude-490

Offensive Security Research Config for Claude Code !TIP...

CVE-2026-39861

Claude Code is an agentic coding tool. Prior to version 2.1.64, Claude Code's sandbox did not prevent sandboxed processes from creating symlinks pointing to locations outside the workspace. When Claude Code subsequently wrote to a path within such a symlink, its unsandboxed process followed the...