The Crack in The Vault: How Banking Sites Unknowingly Expose Customer Data to Third Parties

Banks are trusted to protect our most private financial details, but new security research reveals a major gap between that promise and digital reality. Jscrambler’s analysis of financial institutions across the US and Europe reveals a critical vulnerability: sensitive customer and commercial data – such as loan amounts, account details, and hashed emails – is routinely leaked to third-party ad platforms. Worse, these third-party browser scripts bypass traditional security perimeters and ignore privacy choices, capturing data before consent or even after a user selects “reject all.” In this webinar, we analyzed data exposure cases documented across 14 US and European financial sites. We explained how scripts bypass cookie consent, map the paths sensitive data takes, and discussed the steps you should take to implement runtime controls to secure these flows.