People search Canada Revenue Agency data breach timeline because the brand sits on billions of accounts, credentials, and cloud workloads. BreachHistory indexes 2 Canada Revenue Agency-linked incidents, with headline counts up to 49K+ in catalog rows. This page maps every attested event through 2026 with internal links to canonical records.
Why Canada Revenue Agency breach history matters
Canada Revenue Agency operates in Government (Canada). 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
2024 — 34K+ breaches
Cataloged incident. 31,393 material breaches FY2024. Unauthorized taxpayer info use. Credential stuffing 2020 investigated 2024. Exposed categories include Taxpayer information. BreachHistory cites approximately 34K+ affected records in this row. See the canada-revenue-agency2024 and canonical BreachHistory entry.
2020 — credential stuffing, 48,500 accounts
Cataloged incident. Credential stuffing attack on CRA and related government portals. Attackers used credentials from prior breaches to access My Account, My Business Account, Represent a Client. SINs and other tax data potentially exposed. Exposed categories include SINs, tax information, personal data. BreachHistory cites approximately 49K+ affected records in this row. See the canada-revenue-agency2020 and canonical BreachHistory entry.
Patterns and analysis
- Credential theft and social engineering — appears across multiple Canada Revenue Agency 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 Canada Revenue Agency company page for new 2026+ disclosures.
Canonical BreachHistory hub
Explore every indexed row: breachhistory.com/canada-revenue-agency · Latest: canada-revenue-agency2024.
Sources: BreachHistory catalog (2 rows for Canada Revenue Agency), company and regulator disclosures cited in individual breach records.