CVE-2026-62856

HighCVSS 7.7/10Last modified Nov 12, 2026

Description

FreeScout is a self-hosted help desk and shared mailbox application. Prior to version 1.8.226, the polycast/receive endpoint fails to escape SQL LIKE wildcards in supplied channel names, while channel authorization applies only to names with specific prefixes. An unauthenticated attacker with a guest session and valid CSRF token can submit a wildcard channel name to retrieve matching notification events intended for other users. Notification payload generation lacks a corresponding access check, exposing conversation message content, identifiers, URLs, and notification HTML across users and mailboxes. This issue is fixed in version 1.8.226.

Metrics

CVSS 3.1 7.7/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Weakness enumeration

CWE-89 CWE-200 CWE-639

Affected software

No affected versions have been published.

Timeline

Published: Nov 6, 2026
Last modified: Nov 12, 2026
NVD status: Deferred

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