Atlassian
Data Breach on December 10, 2023
| Data Breach Report | ||
|---|---|---|
| Victim | atlassian.com | |
| Claimed By | SiegedSec | |
| Date Discovered | Dec 10, 2023 | |
| Description | Atlassian provides collaboration, development, and issue tracking software for teams. | |
| Leak Size | Unknown |
Credential Exposure for atlassian.com
We've indexed 951 @atlassian.com accounts from external breaches, plus 258,208 credentials for atlassian.com itself.
Last checked Aug 23, 2026
| @atlassian.com addresses from external breaches | |
|---|---|
| Third-party breaches | 713 accounts · across 103 breaches · 624 with a plaintext password · most recent Feb 7, 2026 |
| Combo lists | 290 accounts · most recent Aug 21, 2026 |
| Phishing pages | 26 accounts · most recent Aug 12, 2026 |
| Passwords for atlassian.com accounts | |
|---|---|
| Combo lists | 176,714 logins · most recent Aug 23, 2026 |
| Infostealer logs | 95,858 logins · 75,034 infected devices · most recent Aug 8, 2026 |
Logins may belong to customers or to staff, and the data doesn't say which. None of this is necessarily connected to the ransomware attack above.
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