CVE-2026-111667 getrebuild CVE debrief

Who should care

Defenders responsible for REBUILD instances, particularly those with authenticated low-privileged users, should assess exposure and implement compensating controls. This includes verifying exposure of REBUILD instances to authenticated low-privileged users accessing task comments and implementing compensating controls to restrict access to task comments. Additionally, defenders should review vendor guidance, conduct asset inventory to identify potentially

Why it matters

CVE-2026-111667 is a missing authorization vulnerability in REBUILD through 4.5.0 that allows authenticated low-privileged users to read task comments without project membership checks, requiring defenders to verify exposure and implement compensating controls.

• Potential unauthorized access to task comments by authenticated low-privileged users
• Need to verify exposure of REBUILD instances to this vulnerability
• Priority on implementing compensating controls to restrict access to task comments

Technical summary

The vulnerability exists in the TaskCommentController.commentList method, allowing authenticated low-privileged users to read task comments without project membership checks by supplying the id of a task in a private project to the /project/comments/list endpoint. This enables attackers to access task comments and attachment references without proper authorization. The vulnerability affects REBUILD through 4.5.0 and requires defenders to verify exposure and implement compensating controls to restrict access to task comments.

Defensive priority

Defenders should prioritize verifying exposure and implementing compensating controls for authenticated low-privileged users accessing task comments.

Recommended defensive actions

• Verify exposure of REBUILD instances to authenticated low-privileged users accessing task comments
• Implement compensating controls to restrict access to task comments
• Monitor for potential unauthorized access to task comments
• Review vendor guidance for REBUILD instances
• Conduct asset inventory to identify potentially affected systems
• Track exceptions and retest remediated assets
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and source item provide details on the missing authorization vulnerability in REBUILD through 4.5.0. The vulnerability allows authenticated low-privileged users to read task comments without project membership checks. Evidence is limited to the CVE record and source item, which provide a technical description of the vulnerability. Defenders should verify exposure and implement compensating controls to restrict access to task comments. The CVE Program record and NVD detail page offer additional information on the missing

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.