CtrlK
BlogDocsLog inGet started
Tessl Logo

fallback-python-shell

Use run_shell with Python heredoc when execute_code_sandbox or read_file fail

53

Quality

58%

Does it follow best practices?

Run evals on this skill

Adds up to 20 points to the overall score

View guide

SecuritybySnyk

High

Do not use without reviewing

Fix and improve this skill with Tessl

tessl review fix ./benchmarks/gdpval/skills/fallback-python-shell/SKILL.md
SKILL.md
Quality
Evals
Security

Security

2 findings: 1 high severity, 1 medium severity. You should review these findings carefully before considering using this skill.

High

W007: Insecure credential handling detected in skill instructions.

What this means

The skill handles credentials insecurely by requiring the agent to include secret values verbatim in its generated output. This exposes credentials in the agent’s context and conversation history, creating a risk of data exfiltration.

Why it was flagged

The skill tells the agent to run Python that opens arbitrary files and "print results to stdout to capture them in the tool response," which encourages outputting file contents verbatim and therefore can expose any secrets contained in those files.

Report incorrect finding
Medium

W013: Attempt to modify system services in skill instructions.

What this means

The skill prompts the agent to compromise the security or integrity of the user’s machine by modifying system-level services or configurations, such as obtaining elevated privileges, altering startup scripts, or changing system-wide settings.

Why it was flagged

The skill explicitly instructs the agent to "bypass sandbox" by running Python via run_shell (heredoc), enabling unrestricted file I/O and the ability to read or write arbitrary files on the host.

Repository
HKUDS/OpenSpace
Audited
Security analysis
Snyk

Is this your skill?

If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.