TI-2026-75453 Aliases CVE-2026-111667 GHSA-5cv6-8j9w-94rq

REBUILD Missing Authorization in Task Comment Listing Endpoint

MEDIUM 57CWE-639Published 2026-10-16 · Updated 2026-10-16

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Security bypass
Confidentiality · integrity · availability: Low · None · None
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-639.

Summary

REBUILD through 4.5.0 contains a missing authorization flaw in TaskCommentController.commentList (CWE-639). An authenticated low-privileged user can read task comments without project membership checks by supplying the id of a task in a private project to the /project/comments/list endpoint, which returns comment content and attachment references.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00305 23rd percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
getrebuild	rebuild	up to 4.5.0	—	No fix listed	CNA

rebuild Vendorgetrebuild Affected up to 4.5.0 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for REBUILD.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

2026-10-16 Threatist record created from CVE-2026-111667
2026-10-16 Alias added: GHSA-5cv6-8j9w-94rq
2026-10-16 CISA SSVC decision points changed
2026-10-16 Priority changed: LOW → MEDIUM

References

Advisory 1

https://hackmd.io/@hieuPenguinnn/getrebuild-rebuild-project-task-comment-idor

Other 1

https://github.com/getrebuild/rebuild/blob/4.5.0/src/main/java/com/rebuild/web/project/TaskCommentController.java#L37-L62

TI-2025-32265 An issue was discovered in getrebuild/rebuild 4.0.4. CVSS 3.1CRITICAL 9.8
TI-2026-74105 Authorization bypass in REBUILD aibot2 chat endpoints CVSS 4.0MEDIUM 6.0
TI-2024-30956 Rebuild v3.7.7 was discovered to contain a Server-Side Request Forgery (SSRF) via the… CVSS 3.1MEDIUM 5.1
TI-2024-16676 An SSRF issue in REBUILD v.3.5 allows a remote attacker to obtain sensitive information… CVSS 3.1CRITICAL 9.1
TI-2023-02323 Rebuild cross-site request forgery CVSS 3.1MEDIUM 4.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences