People search Klaviyo data breach timeline because the brand sits on billions of accounts, credentials, and cloud workloads. BreachHistory indexes 1 Klaviyo-linked incident. This page maps every attested event through 2026 with internal links to canonical records.
Why Klaviyo breach history matters
Klaviyo operates in Technology (United States). Across indexed rows, recurring themes include credential theft and social engineering. Understanding the chronological pattern helps security teams, customers, and regulators separate confirmed disclosures from forum marketing.
Full timeline through 2026
2022 — phishing-led employee account compromise; crypto-customer marketing lists exfiltrated
Cataloged incident. Klaviyo stated attackers phished employee credentials and exported marketing-list data for a focused set of cryptocurrency-industry customers; the company forced rotations and published an incident blog. Exposed categories include Marketing list fields for targeted crypto-related customer accounts per Klaviyo. No attested victim count is published for this row yet. See the klaviyo2022man37 and canonical BreachHistory entry.
Patterns and analysis
- Credential theft and social engineering — appears across multiple Klaviyo catalog entries; prioritize controls that address this class of failure.
- Record-count hygiene — BreachHistory indexes actor-cited figures separately from company-confirmed totals; read each row's technicalWriteup before treating counts as fact.
- 2026 monitoring — New disclosures roll into this timeline as they are verified or labeled unverified per catalog policy.
What to do if you may be affected
- Step 1: Enable phishing-resistant MFA on every account tied to this brand.
- Step 2: Use unique passwords and a password manager—breach rows often involve credential reuse.
- Step 3: Monitor official company breach notices and regulator filings, not dark-web downloads.
- Step 4: Review OAuth app permissions and revoke unused third-party integrations.
- Step 5: Bookmark the Klaviyo company page for new 2026+ disclosures.
Canonical BreachHistory hub
Explore every indexed row: breachhistory.com/klaviyo · Latest: klaviyo2022man37.
Sources: BreachHistory catalog (1 row for Klaviyo), company and regulator disclosures cited in individual breach records.