Vulnerability · Published Oct 16, 2026 · Assigned by VulnCheck

CVE-2026-111667REBUILD through 4.5.0 Missing Authorization via /project/comments/list Endpoint

Medium 4.3

In plain English

A medium-severity authorization bypass via user-controlled key in rebuild from getrebuild. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.3%top 76.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
getrebuild	rebuild	0 – through 4.5.0

Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References

https://hackmd.io/@hieuPenguinnn/getrebuild-rebuild-project-task-comment-idor third-party-advisory
https://github.com/getrebuild/rebuild/blob/4.5.0/src/main/java/com/rebuild/web/project/TaskCommentController.java#L37-L62 technical-description
VulnCheck Advisory: REBUILD through 4.5.0 Missing Authorization via /project/comments/list Endpoint third-party-advisory