Frontwave Credit Union Reports Data Breach Affecting Member SSNs After Vendor Error Oceanside, Calif. Frontwave Credit Union, a $1.7 billion financial institution, disclosed a data breach involving member names and Social Security numbers after a service provider accidentally shared sensitive information with another credit union. The incident was reported to the California Attorney General’s Office on April 28, 2026, with the breach occurring on April 3, 2026. According to Frontwave’s notification, the credit union was alerted by the vendor on April 3 that non-public member data had been exposed. The recipient credit union, which was not named, confirmed deletion of the information. Frontwave stated there is no evidence of misuse but acknowledged the exposure of personally identifiable data. As a remedial measure, affected members are being offered 12 months of complimentary Experian IdentityWorks protection, including credit monitoring, identity restoration support, and up to $1 million in identity theft insurance. The breach appears to have been contained, with no indication of broader impact.