You may be surprised to hear that Israeli elections are being held today. Here’s another shocking fact: the personal data of millions of people was reportedly exposed online today in the breach of the software code used for voting booths.

The breach was discovered by the whistleblowers at Israeli security firm Globes, and they reported the security breach on their blog at 4:16 AM EST. The Israeli television channel Ynet reported earlier that the data may have been stored on a Facebook app called “Weep Tide,” which is used to create voting booth layouts.

The online code for voting booths actually works as a custom web browser, which we used to visualize our data from the past elections. Last time there was a breach, the company that runs the voting booth software decided to deactivate the software.

According to the report on Globes, Globes received an alert on Friday, but did not publish their findings until now as they were unaware of the extent of the breach. The threat data was harvested over the past four years, according to the report.

This can have a serious impact on the election results of the country. Globes reported that Israeli election headquarters has already sent out a note to all 26 district directors, warning them about the data breach and the potential threats it poses.

The data breach caused security experts to raise flags, as political parties rely on confidential data for their marketing and recruitment campaigns. In addition, as Israel doesn’t participate in the Vulnerability Reward Program, it could have exposed its voting software to a more hostile third party.

The fact that the online code was vulnerable to attack does not mean that anyone will take advantage of the breach; you would need some specialized tools to crack the data.

Read next: Watch: Watch long dogs walk a tightrope just inches above a busy urban city