New Research Exposes Critical Gap: 64% of Third-Party Applications Access Sensitive Data Without Authorization

Reflectiz has published its 2026 State of Web Exposure Research , identifying a significant increase in client-side risk on global websites. This rise is primarily attributed to third-party applications, marketing tools, and unmanaged digital integrations.

The analysis of 4,700 leading websites indicates that 64% of third-party applications access sensitive data without valid business justification, up from 51% the previous year. This represents a 25% year-over-year increase, highlighting a growing governance gap.

The report also notes a substantial rise in malicious web activity across public-sector infrastructure. Malicious activity on government websites increased from 2% to 12.9%, and 1 in 7 education websites now shows evidence of compromise, a fourfold increase over the previous year.

Public-sector security leaders identified budget constraints and limited manpower as significant challenges.

The research identifies several common third-party tools as major contributors to unjustified sensitive-data exposure, including Google Tag Manager (8%), Shopify (5%), and Facebook Pixel (4%), which are often over-permissioned or deployed without proper scoping.

Simon Arazi, VP of Product at Reflectiz, noted that organizations are granting sensitive-data access by default, allowing attackers to exploit these gaps. Marketing teams introduce a significant portion of third-party risk, while IT departments often lack visibility into active website components.

64% of applications accessing sensitive data have no valid justification. 47% of applications in payment frames are unjustified. Compromised sites connect to 2.7 times more external domains, load twice as many trackers, and use recently registered domains 3.8 times more often than clean sites. Marketing and Digital departments account for 43% of all third-party risk.

The report introduces updated Security Leadership Benchmarks, identifying a small group of organizations meeting all eight criteria. Only one website, ticketweb.uk, achieved a perfect score.

Sector-by-sector breakdowns of web exposure risk Comprehensive list of high-risk third-party applications Year-over-year industry trends Technical indicators of compromise Best-practice controls for security and digital teams

The complete 43-page analysis is available for download: https://www.reflectiz.com/learning-hub/web-exposure-2026-research/

Reflectiz provides organizations with tools to secure websites and digital assets against modern web threats. Its agentless platform offers continuous visibility into client-side activity, identifying and prioritizing security, privacy, and compliance risks. Reflectiz is trusted by global enterprises across sectors such as financial services, e-commerce, and healthcare.

Based on reporting by Cyber Security News.