Resident registration numbers and medical certificates exposed in public bodies’ disclosure portal documents
Personal and sensitive information, including resident registration numbers, passport numbers and cancer diagnosis certificates relating to public officials and private individuals, was exposed in attachments to 35 documents from at least 22 public bodies published on the Information Disclosure Portal. The causes were identified as omissions in the non-disclosure and masking settings applied by the bodies that produced the documents, alongside limitations in filtering unstructured files. The Ministry of the Interior and Safety suspended downloads of original documents on 5 November and began a comprehensive inspection of public bodies, with an investigation into the extent of the exposure still under way on 9 November.
Key facts
- Affected organisation
- Ministry of the Interior and Safety
- Incident type
- Data breach
- Occurred / detected
- 2026-11-05
- Scale of damage
- Personal and sensitive information exposed in attachments to 35 documents from at least 22 public bodies
- Cause / method
- Omissions in non-disclosure and masking settings by the bodies that produced the documents, and limitations in filtering unstructured files
- Location
- South Korea
If your data was exposed
Exposed dataNational ID numberHealth & medical data
- Don’t tap links in texts, calls or emails that mention this incident and offer compensation, refunds or breach checks. Check directly on the organisation’s official website or app.
- Block new mobile phone activations in your name, and register with the Financial Supervisory Service as a person whose personal data was exposed to strengthen identity checks on financial transactions in your name. If a copy of your ID was leaked, consider having it reissued.Identity theft prevention service (M-Safer) ↗Personal data exposure accident prevention system ↗
- If you’ve suffered harm, report it. Call 118 (no area code) for privacy violations, contact the police for financial losses, and apply for dispute mediation to seek compensation.Personal Information Infringement Report Centre ↗Korean National Police Agency cybercrime report ↗Personal Information Dispute Mediation Committee ↗
Lookup and notice links are official pages found by AI. Make sure the address is on the organisation’s official domain before using it.
Timeline
- Following the exposure of personal information on the Information Disclosure Portal, the Ministry of the Interior and Safety suspended downloads of original documents and asked all public bodies to carry out a comprehensive inspection.
- As the investigation into the extent of the personal information leak continued, it emerged that a leak had also been reported seven months earlier.
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The summary and key facts are written by AI from related reports and may contain errors. Check the original articles and the organisation’s official statements for accurate details.