People search Atlassian data breach timeline because the brand sits on billions of accounts, credentials, and cloud workloads. BreachHistory indexes 2 Atlassian-linked incidents, with headline counts up to 15.1M+ in catalog rows. This page maps every attested event through 2026 with internal links to canonical records.
Why Atlassian breach history matters
Atlassian operates in Technology (Australia). Across indexed rows, recurring themes include cloud and database misconfiguration. Understanding the chronological pattern helps security teams, customers, and regulators separate confirmed disclosures from forum marketing.
Full timeline through 2026
2024 — 15.1M emails via misconfigured API
Cataloged incident. Trello (Atlassian) suffered a data exposure in 2024 when researchers discovered that a misconfigured API could be abused to link email addresses to 15 million Trello accounts. The API allowed enumeration of user data without proper authentication. Exposed categories include Email addresses linked to usernames and account info. BreachHistory cites approximately 15.1M+ affected records in this row. See the atlassian2024 and canonical BreachHistory entry.
2022 — — Customer data
Cataloged incident. Hacked. Customer data. Exposed categories include Names, emails, addresses, and other PII. No attested victim count is published for this row yet. See the atlassian2022 and canonical BreachHistory entry.
Patterns and analysis
- Cloud and database misconfiguration — appears across multiple Atlassian 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 Atlassian company page for new 2026+ disclosures.
Canonical BreachHistory hub
Explore every indexed row: breachhistory.com/atlassian · Latest: atlassian2024.
Sources: BreachHistory catalog (2 rows for Atlassian), company and regulator disclosures cited in individual breach records.