2026 State of Software Security

Innovation and risk are inseparable, but the 2026 State of Software Security (SoSS) report illuminates a sobering reality: flaw creation is decisively outstripping remediation capacity. The accumulation of “security debt”—known vulnerabilities left unresolved for more than a year—is now a present reality for 82% of organizations, marking an 11% increase in just one year. This report moves beyond generic severity scoring to help teams prioritize, protect, and prove their security posture in an era of finite resources.

The crisis is intensifying as high-risk vulnerabilities—those both highly severe and likely to be exploited—saw a 36% relative surge year-over-year. This surge reflects the convergence of microservices complexity, API proliferation, and the double-edged impact of AI-assisted code generation. While organizations are successfully finding fewer flaws overall, they are struggling to fix the most dangerous ones quickly enough to close the widening exposure window.

Third-party supply chain challenges remain a dominant driver of risk. Despite modest improvements in open-source hygiene, third-party components represent 66% of the most dangerous, long-lived “critical debt” vulnerabilities. This report rewards the reader by detailing the complexity of managing transitive dependencies and offering actionable triage protocols to reduce critical debt by 25% within 180 days.

Key Findings

• Ubiquitous Security Debt: 82% of organizations are currently burdened by security debt (vulnerabilities >1 year old), an 11% relative increase from the previous year.
• Critical Debt Surge: Organizations carrying “critical” security debt rose by 20% year-over-year, now affecting 60% of all firms analyzed.
• 36% High-Risk spike: There was a 36% relative increase in the concentration of vulnerabilities that are both highly severe and highly exploitable.
• Third-Party Vulnerability Density: Third-party components and open-source libraries account for 66% of all critical security debt vulnerabilities.
• Remediation Half-Life Gap: The half-life for third-party flaws is 358 days, nearly four months longer than the average of 243 days across all scan types.
• Fixed Capacity Stagnation: Median organizations typically fix only about 10% of their total vulnerability backlog each month, a rate that fails to keep pace with new flaw creation.