---
id: CVE-2026-18744
title: >-
  Any authenticated case participant can fetch any OTHER vendor's CaseStatement
  + per-vul CaseMemberStatus by supplying that member's id — test_func only
  checks _is_my_case, not ownership of kwargs['member']
summary: >-
  Any authenticated case participant can fetch any OTHER vendor's CaseStatement
  + per-vul CaseMemberStatus by supplying that member's id — test_func only
  checks _is_my_case, not ownership of kwargs['member']. Bypasses share_status;
  leaks e…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-639
published: '2026-08-12'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T14:07:24.140'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-18744'
references:
  - url: 'https://github.com/CERTCC/VINCE'
    label: cret@cert.org
  - url: 'https://github.com/CERTCC/VINCE/pull/235'
    label: cret@cert.org
tags:
  - nvd
epss: 0.00426
epssPercentile: 0.34156
ingestedAt: '2026-09-08T15:33:26.953Z'
---

## Overview

Any authenticated case participant can fetch any OTHER vendor's CaseStatement + per-vul CaseMemberStatus by supplying that member's id — test_func only checks _is_my_case, not ownership of kwargs['member']. Bypasses share_status; leaks embargoed vendor affected/not-affected + statement text cross-tenant.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.