People search Commonwealth Bank of Australia data breach timeline because the brand sits on billions of accounts, credentials, and cloud workloads. BreachHistory indexes 1 Commonwealth Bank of Australia-linked incident, with headline counts up to 10K+ in catalog rows. This page maps every attested event through 2026 with internal links to canonical records.
Why Commonwealth Bank of Australia breach history matters
Commonwealth Bank of Australia operates in Finance (India). 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
2018 — staff emails mis-addressed to cba.com vs cba.com.au; ~10k customers referenced (2016–17 pattern)
Cataloged incident. Commonwealth Bank of Australia (CBA) publicly explained that staff had sent hundreds of internal emails to `@cba.com` instead of `@cba.com.au`, a path that misrouted messages containing metadata on roughly 10,000 customers across 2016–2017 correspondence. iTnews, SMH, and the bank’s newsroom stated the external domain operator auto-purged body content, leaving only sender/recipient/subject traces in many cases, and that CBA ultimately acquired the confusing domain; the episode was regulated as a serious operational Exposed categories include Customer-identifying content in misrouted administrative email per CBA investigation narratives—full field-level exposure debated by recipients. BreachHistory cites approximately 10K+ affected records in this row. See the commonwealth-bank-of-australia2018 and canonical BreachHistory entry.
Patterns and analysis
- Mixed intrusion and disclosure events — appears across multiple Commonwealth Bank of Australia 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: Bookmark the Commonwealth Bank of Australia company page for new 2026+ disclosures.
Canonical BreachHistory hub
Explore every indexed row: breachhistory.com/commonwealth-bank-of-australia · Latest: commonwealth-bank-of-australia2018.
Sources: BreachHistory catalog (1 row for Commonwealth Bank of Australia), company and regulator disclosures cited in individual breach records.