VulnerabilityRapid7 Blog·6 hours ago
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VulnerabilityTrail of Bits·1 month ago
Mutation testing comes to DAML
Mewt, an open-source mutation-testing engine, now supports DAML smart contracts by deliberately injecting code flaws to expose gaps in test suites that traditional coverage metrics miss. The tool includes two DAML-specific mutations targeting authorization vulnerabilities—the most common bug class in contract development—and can identify missing security tests even when coverage reports show 100%. Early testing on production codebases revealed that standard happy-path tests often fail to verify negative cases like unauthorized party actions, leaving exploitable vulnerabilities undetected.
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