Missing Authorization Flaw in REBUILD Project Task Comments by REBUILD
CVE-2026-111667

5.3MEDIUM

Key Information:

Vendor

Getrebuild

Status
Rebuild
Vendor
CVE Published:
16 October 2026

What is CVE-2026-111667?

The REBUILD software, specifically versions up to 4.5.0, is impacted by a missing authorization vulnerability in the TaskCommentController.commentList function. This flaw allows low-privileged, authenticated users to access task comments without undergoing necessary project membership checks. By manipulating the task ID and querying the /project/comments/list endpoint, attackers can retrieve comments and their associated attachments from private projects, potentially compromising sensitive information.

Affected Version(s)

rebuild 0 <= 4.5.0

References

https://hackmd.io/@hieuPenguinnn/getrebuild-rebuild-proje...
third-party-advisory
https://github.com/getrebuild/rebuild/blob/4.5.0/src/main...
technical-description
https://www.vulncheck.com/advisories/rebuild-through-4.5....
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

hieuPenguinnn
.