Data Breaches

Prosper Data Breach Impacts 17.6 Million Accounts

Hackers stole names, addresses, dates of birth, email addresses, Social Security numbers, government IDs, and other information.

Data breach

More than 17 million individuals were likely impacted by a data breach at peer-to-peer lending marketplace Prosper, data breach notification service Have I Been Pwned warns.

Prosper disclosed the incident last month, noting that hackers accessed its network and stole confidential, proprietary, and personal information from its systems.

According to the US-based company, the attackers queried its database containing customer information and applicant data to exfiltrate the information, but did not access user accounts.

“There is no evidence of unauthorized access to customer accounts and funds, and our customer-facing operations continue uninterrupted,” Prosper said.

The company said it had contained the incident and no unauthorized activity was observed since September 2. Law enforcement was notified of the attack.

While Prosper did not specify the type of personal information that was compromised, only noting that Social Security numbers were stolen, Have I Been Pwned has added the stolen information to its database, so that individuals can check if they have been affected.

Advertisement. Scroll to continue reading.

The database, the breach notification service says, contains information pertaining to 17.6 million Prosper accounts, including names, addresses, IP addresses, email addresses, dates of birth, government IDs, employment statuses, income levels, credit statuses, and browser user agent details.

Prosper says it is still investigating the incident, noting it takes time to analyze the compromised information, determine who it belongs to, and coordinate notifications.

“We will be offering free credit monitoring as appropriate after we determine what data was affected. We continuously monitor accounts and have strong safeguards in place to protect customers’ funds,” Prosper said.

SecurityWeek has emailed Prosper for a statement on the compromised information and will update this article if the company responds.

UPDATE: Prosper has provided SecurityWeek the following statement:

We’re aware of the statement by [Troy Hunt of Have I Been Pwned] but we are not able to validate his claim. The investigation to determine what data was affected and to whom it belongs remains ongoing.  We will be offering free credit monitoring as appropriate after we determine what data was affected. Resolving this incident is our top priority and we are committed to sharing additional information with our customers as appropriate.

Related: Customer Service Firm 5CA Denies Responsibility for Discord Data Breach

Related: SimonMed Imaging Data Breach Impacts 1.2 Million

Related: 1.2 Million Impacted by WestJet Data Breach

Related: 766,000 Impacted by Data Breach at Dealership Software Provider Motility

Related Content

Data Breaches

Ernst & Young previously confirmed that personal and financial information was stolen from a third-party management platform.

Data Breaches

The hacker claimed to have stolen the information of 2 million Origin Energy customers after breaching its systems.

Data Breaches

The Anubis cybercrime group has taken credit for the attack and is threatening to leak data.

Data Breaches

In May 2026, hackers stole personal and dental health information from DentaQuest’s computer network.

Data Breaches

The PEAR ransomware group claimed to have stolen 3 TB of information from the medical business management company.

Data Breaches

A hacker claims to have stolen the information of 2 million Origin Energy customers and is threatening to leak it. 

Data Breaches

Threat actors used credentials obtained from other companies to hack into Chick-fil-A One accounts.

Data Breaches

Hackers recently obtained non-sensitive customer information and other documents from the company.

Copyright © 2026 SecurityWeek ®, a Wired Business Media Publication. All Rights Reserved.

Exit mobile version