---
id: CVE-2026-18749
title: >-
  The type=track branch authorises on _is_my_case(t_attach.case) only and never
  checks VinceTrackAttachment.shared
summary: >-
  The type=track branch authorises on _is_my_case(t_attach.case) only and never
  checks VinceTrackAttachment.shared. A coordinator-uploaded case artefact that
  has NOT been marked shared is still retrievable by any case member who has (or
  is…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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-2026-18749'
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: 0.00512
epssPercentile: 0.41062
ingestedAt: '2026-09-08T15:33:26.953Z'
---

## Overview

The type=track branch authorises on _is_my_case(t_attach.case) only and never checks VinceTrackAttachment.shared. A coordinator-uploaded case artefact that has NOT been marked shared is still retrievable by any case member who has (or is sent) its uuid — leaks not-yet-released coordinator material to vendors on the case.

## Remediation

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