What is CVE-2026-111667?

CVE-2026-111667 is a medium-severity vulnerability in Getrebuild Rebuild, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-10-16.

How severe is CVE-2026-111667?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Getrebuild Rebuild

CVE-2026-111667

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.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published 2026-10-16 · last modified 2026-10-16.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Getrebuild Rebuild

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

hackmd.io/@hieuPenguinnn/getrebuild-rebuild-project-task-comment-idor (third-party-advisory)
github.com/getrebuild/rebuild/blob/4.5.0/src/main/java/com/rebuild/web/project/… (technical-description)
www.vulncheck.com/advisories/rebuild-through-4.5.0-missing-authorization-via-pr… (third-party-advisory)

Frequently asked questions

What is CVE-2026-111667?: CVE-2026-111667 is a medium-severity vulnerability in Getrebuild Rebuild, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-10-16.
How severe is CVE-2026-111667?: Medium severity. CVSS v3 base score is 4.3 out of 10.