Software defect
A problem that makes a program behave differently from what was intended, such as showing the wrong information or stopping a task. It can happen without an attack.
On this site
Example incidents
2026-11-04[Severity: Major][Software defect][Data leak]
JR East: JRE ID bug may have shown other users' IDs to up to 546 peopleAn update introduced a bug that could display another user’s ID.
Related terms
Sources
- [1][Official]JRE IDサービスにおけるシステム不具合に伴うお客さま情報の誤表示についてJR East · 2026-11-04