Democratic Party of Korea security incident history
Hacking, data breaches and other security incidents involving Democratic Party of Korea, with related coverage.
Personal data of 17,088 members of Democratic Party's Blue Wave community leaked
17.1kImpact: Personal information of 17,088 Blue Wave members
Names, usernames, encrypted passwords, email addresses and other data of 17,088 members of the Democratic Party of Korea's party member community Blue Wave were leaked through hacking. The leak is believed to have occurred in September 2025, and the party became aware of the incident on 6 August 2026 through an outside tip. Party officials expressed apologies and willingness to cooperate with the investigation, and the service was temporarily shut down on 11 August for a security check.
Related reports: 28 · last report →Claims of membership list leak at Democratic Party's North Chungcheong branch
Allegations of a party membership list leak have resurfaced within the Democratic Party of Korea's North Chungcheong Province branch. Whether a leak actually took place, its extent, timing and the response have not been confirmed.
Read on 한겨레 ↗Signs of leak and sale of Democratic Party's Yeosu B dues-paying member roster
Impact: Roster of Yeosu B dues-paying members
Signs have emerged that the roster of dues-paying members of the Democratic Party of Korea's Yeosu B constituency was leaked and traded. The indications have sparked controversy.
Read on 뉴스탑전남 ↗Democratic Party of Korea website hit by suspected DDoS during all-member vote
Impact: Three website access outages
On 13 April 2025, during an all-member vote on the Democratic Party of Korea's primary rules, traffic to the party's website surged and access was disrupted three times. Suspecting a DDoS attack, the party decided to report the security incident to the Korea Internet & Security Agency (KISA) and request an investigation. Online voting, which was conducted on a separate server, suffered no further damage.
Read on 뉴시스 ↗