People search ShareThis data breach timeline because the brand sits on billions of accounts, credentials, and cloud workloads. BreachHistory indexes 3 ShareThis-linked incidents, with headline counts up to 41M+ in catalog rows. This page maps every attested event through 2026 with internal links to canonical records.
Why ShareThis breach history matters
ShareThis operates in Technology. Across indexed rows, recurring themes include mixed intrusion and disclosure events. Understanding the chronological pattern helps security teams, customers, and regulators separate confirmed disclosures from forum marketing.
Full timeline through 2026
2019 — — ShareThis: ShareThis was part of the theft of 617 million…
Cataloged incident. Feb 2019. ShareThis was part of the theft of 617 million online account details from 16 hacked websites, put up for sale on the dark web. BreachHistory cites approximately 41M+ affected records in this row. See the sharethis2019 and canonical BreachHistory entry.
2019 — — ShareThis: Hacking, 4,100,000 records
Cataloged incident. Part of the theft of 617 million online account details from 16 hacked websites, put up for sale on the dark web. Exposed categories include Personal and demographic data. BreachHistory cites approximately 4.1M+ affected records in this row. See the sharethis2019-iib and canonical BreachHistory entry.
2019 — 40M records
Cataloged incident. Social sharing. Data sold on RaidForums. Exposed categories include Emails, hashed passwords. BreachHistory cites approximately 40M+ affected records in this row. See the sharethis-inc-2019 and canonical BreachHistory entry.
Patterns and analysis
- Mixed intrusion and disclosure events — appears across multiple ShareThis 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 ShareThis company page for new 2026+ disclosures.
Canonical BreachHistory hub
Explore every indexed row: breachhistory.com/sharethis · Latest: sharethis2019.
Sources: BreachHistory catalog (3 rows for ShareThis), company and regulator disclosures cited in individual breach records.