CVE-2026-111667

Description

REBUILD through 4.5.0 contains a missing authorization vulnerability in TaskCommentController.commentList that allows authenticated low-privileged users to read task comments without project membership checks. Attackers can supply the id of a task in a private project to the /project/comments/list endpoint to retrieve its comment content and attachment references.

References

• https://github.com/getrebuild/rebuild/blob/4.5.0/src/main/java/com/rebuild/web/project/TaskCommentController.java#L37-L62
• https://hackmd.io/@hieuPenguinnn/getrebuild-rebuild-project-task-comment-idor
• https://www.vulncheck.com/advisories/rebuild-through-4.5.0-missing-authorization-via-project-comments-list-endpoint
• https://hackmd.io/@hieuPenguinnn/getrebuild-rebuild-project-task-comment-idor