Stack Overflow Data Breach History
WebsiteStack Overflow's public platform serves 100 million people every month, making it one of the 50 most popular websites in the world. Founded in 2008, Stack Overflow’s public platform is used by nearly everyone who codes to learn, share their knowledge, collaborate, and build their careers. Our products and tools help developers and technologists in life and at work. These products include Stack Overflow for Teams, Stack Overflow Advertising, and Stack Overflow for Talent. Stack Overflow for Te
This page shows all data breaches of Stack Overflow. View the complete breach timeline, records exposed, root causes, and AI breach risk score. BreachHistory tracks disclosed data breaches worldwide.
Data Breach Timeline — All Stack Overflow Breaches
Stack Overflow Data Breach Summary
This page tracks the Stack Overflow data breach history and cybersecurity incidents affecting Stack Overflow (Colombia). BreachHistory currently indexes 1 publicly disclosed or catalogued incident spanning 2019, with approximately 184 records reported as exposed across all indexed events. These totals may include overlapping datasets or third-party estimates and should not be interpreted as unique affected users.
The Stack Overflow breach timeline includes major data breaches, cyber attacks, data leaks, credential exposures, API abuse, and other security incidents. Each incident provides details on the estimated records exposed, attack method, affected data types, and supporting public sources. Currently, 0 incidents are company-confirmed.
Largest Stack Overflow Data Breaches
The largest indexed incidents include the 2019 Stack Overflow — production intrusion; source code and 184 users’ PII. Record counts originating from threat actors or leak sites should be treated as estimates unless confirmed by Stack Overflow or a regulator. Below is the list of large data breaches:
- 2019 2019 Stack Overflow — production intrusion; source code and 184 users’ PII — about 184 records exposed · Catalogued incident
What Information Was Exposed?
Depending on the incident, exposed data may include email addresses, names, payment card and financial account data, and other personal information (PII). The exact data varies between incidents, so review each breach page before assuming your information was affected.
Stack Overflow Data Breach 2026
At the time of this update, no Stack Overflow data breach has been catalogued for 2026. New incidents are added as official disclosures, regulatory filings, or credible cybersecurity reports become available.
What To Do If You Were Affected
If you believe your account may have been involved in a Stack Overflow data breach, change any reused passwords, enable multi-factor authentication (MFA), monitor your account for suspicious activity, and be cautious of phishing emails or fake breach notifications.
This Stack Overflow breach history is maintained by BreachHistory using public disclosures, regulatory filings, security research, and clearly labelled third-party claims. For the complete breach timeline, records exposed, incident details, and AI Breach Risk Score, explore the sections on this page.