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.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/getrebuild/rebuild/blob/4.5.0/src/main/java/com/rebuild/web/project/TaskCommentController.java#L37-L62
https://hackmd.io/@hieuPenguinnn/getrebuild-rebuild-project-task-comment-idor
https://www.vulncheck.com/advisories/rebuild-through-4.5.0-missing-authorization-via-project-comments-list-endpoint
https://hackmd.io/@hieuPenguinnn/getrebuild-rebuild-project-task-comment-idor

Configurations

No configuration.

History

16 Oct 2026, 19:17

Type	Values Removed	Values Added
References	~~() https://hackmd.io/@hieuPenguinnn/getrebuild-rebuild-project-task-comment-idor -~~	() https://hackmd.io/@hieuPenguinnn/getrebuild-rebuild-project-task-comment-idor -

16 Oct 2026, 18:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-16 18:17

Updated : 2026-10-16 19:17

NVD link : CVE-2026-111667

Mitre link : CVE-2026-111667

CVE.ORG link : CVE-2026-111667

JSON object : View

Products Affected

No product.

CWE

CWE-639

Authorization Bypass Through User-Controlled Key

{"id": "CVE-2026-111667", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-111667", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-16T18:25:03.254459Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 1.4, "exploitabilityScore": 2.8}], "cvssMetricV40": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 5.3, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "disclosure@vulncheck.com", "affectedData": [{"repo": "https://github.com/getrebuild/rebuild", "vendor": "getrebuild", "product": "rebuild", "versions": [{"status": "affected", "version": "0", "versionType": "custom", "lessThanOrEqual": "4.5.0"}], "packageURL": "pkg:github/getrebuild/rebuild", "defaultStatus": "unaffected"}]}], "published": "2026-10-16T18:17:48.660", "references": [{"url": "https://github.com/getrebuild/rebuild/blob/4.5.0/src/main/java/com/rebuild/web/project/TaskCommentController.java#L37-L62", "source": "disclosure@vulncheck.com"}, {"url": "https://hackmd.io/@hieuPenguinnn/getrebuild-rebuild-project-task-comment-idor", "source": "disclosure@vulncheck.com"}, {"url": "https://www.vulncheck.com/advisories/rebuild-through-4.5.0-missing-authorization-via-project-comments-list-endpoint", "source": "disclosure@vulncheck.com"}, {"url": "https://hackmd.io/@hieuPenguinnn/getrebuild-rebuild-project-task-comment-idor", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "description": [{"lang": "en", "value": "CWE-639"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-10-16T19:17:04.653", "sourceIdentifier": "disclosure@vulncheck.com"}