Probo: Cross-tenant IDOR via unvalidated FK references

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-63505
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-11 19:17:43 UTC
Updated2026-11-11 19:17:43 UTC
DescriptionProbo is a self-hostable governance, risk, and compliance (GRC) platform built for engineering and security teams. Prior to version 0.223.1, Probo's console GraphQL API is a multi-tenant GRC platform where all data is scoped to an organization. A Finding can reference a Risk via finding.riskId. That reference is stored without validating that the risk belongs to the caller's organization, and the Finding.risk field resolver authorizes the finding (caller's org) instead of the risk, then loads the risk with a tenant scope derived from the risk's own global ID. As a result, an authenticated member of organization A can attach an arbitrary organization B risk GID to a finding they own and then read organization B's Risk (name, description, treatment, category, severity, owner) — with no membership in B. The stored cross-tenant reference also blocks B from deleting its own risk (ON DELETE RESTRICT), a cross-tenant integrity/DoS. This issue has been patched in version 0.223.1.

Risk And Classification

Primary CVSS: v3.1 4.9 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N

Problem Types: CWE-639 | CWE-639 CWE-639: Authorization Bypass Through User-Controlled Key

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N
3.1CNADECLARED4.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Getprobo Probo affected < 0.223.1 Not specified

References

ReferenceSourceLinkTags
github.com/getprobo/probo/security/advisories/GHSA-c74x-79w6-63jh [email protected] github.com
github.com/getprobo/probo/releases/tag/probod%2Fv0.223.1 [email protected] github.com
github.com/getprobo/probo/commit/d03f6077ddf85ad448cbcb2145341d9543fc4711 [email protected] github.com
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