2021 State of Open-Source Security Report 2021 State of Open-Source Security Report Open-source libraries help software developers meet aggressive deadlines. As a result, these libraries and their classes continue to proliferate and grow in complexityâincreasing the risk they pose while making it more difficult to secure modern applications. The 2021 State of Open-source Security Report uses telemetry from actual applications protected by Contrast OSS and Contrast Assess to reveal key trends about library usage, vulnerabilities, and best practices. Key findings include: While the average application contains 118 libraries, only 38% of libraries are active. The average library uses a version that is 2.5 years oldâwhich increases the risk of unaddressed vulnerabilities.