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SkillSpector v2.9.4

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@github-actions github-actions released this 13 Aug 06:25
v2.9.4
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SkillSpector v2.9.4

Released: 2026-08-12

Summary

This patch strengthens SkillSpector’s safe handling of MCP requests and untrusted skill content, while adding broader prompt-injection and supply-chain detection coverage. It also improves permission guidance, ships a companion Skill Inspector guide, and refreshes project documentation.

Highlights

  • HTTP-exposed MCP servers now reject caller-controlled local scan targets and local YARA-rule directories while preserving local scanning for trusted stdio use.
  • Detect whitespace-padding prompt-injection attempts and shipped Python bytecode, with improved minimum risk scoring for high-impact findings.

Added

  • Add detection for whitespace padding used to hide prompt-injection instructions.
  • Add a HIGH SC8 finding when a skill ships Python bytecode or __pycache__ content.
  • Add the Skill Inspector companion skill guide.

Changed

  • Treat allowed-tools as valid least-privilege permission guidance in remediations and documentation.
  • Add an OpenSSF Scorecard badge to the project documentation.

Fixed

  • Reject local filesystem scan targets and local YARA-rule directories for HTTP MCP transport, preventing remote callers from selecting scanner-host paths.
  • Reject symlinked skill content during discovery and disable Git symlink materialization when cloning input repositories.
  • Ensure high-impact findings receive an appropriate minimum risk score.

Security

  • Harden HTTP MCP transport against local-path access and strengthen skill-content handling against symlink traversal.

Breaking Changes and Migration

  • HTTP MCP clients can no longer scan local filesystem paths or provide local YARA-rule directories. Use a remote repository or URL for HTTP requests; use trusted stdio transport for local scans.

Deprecations

  • None.

Validation

  • Internal GitLab merge-request CI passed lint, unit, integration, Docker smoke, and Sonar analysis for the six imported public changes.
  • uv run --locked --extra dev pytest -q tests/unit/test_mcp_server.py — 26 passed for the HTTP MCP transport remediation.

Known Limitations

  • HTTP MCP transport intentionally rejects local filesystem inputs; this is a security boundary rather than an unsupported scanner capability.

References

  • CHANGELOG.md
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