Minefield

Sapper Revives Minefield to Deliver Accurate SBOM-Based Vulnerability Impact Reports for Cyber Resilience Act Compliance

Developer Perruer has forked the archived BitBom project Minefield into a new open-source tool called Sapper, fixing critical bugs in dependency graph construction and vulnerability matching. The original Minefield used roaring bitmaps and Tarjan's algorithm to build transitive dependency caches from SBOMs in O(n + m) time, but it incorrectly interpreted SPDX edge directions from protobom 0.6, creating false cycles and massively inflating dependent package counts. Additional fixes addressed SQLite memory database pooling issues, OSV range sorting errors with Go pseudo-versions and ECOSYSTEM ecosystems, and slow OSV ingestion by adding a package name index. Sapper now produces prioritized reports using CISA KEV and EPSS scores, showing exact shortest paths from vulnerable packages to root products while respecting OpenVEX statements. The tool maintains full air-gapped operation and supports CycloneDX 1.3–1.7 and SPDX 2.x formats. These improvements directly help organizations meet the 24-hour notification requirements under the EU Cyber Resilience Act for actively exploited vulnerabilities.