{"id":"CVE-2026-62856","published":"2026-11-06T17:18:34.047","lastModified":"2026-11-09T23:17:24.440","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.","cvssScore":7.7,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","cwes":["CWE-89","CWE-200","CWE-639"],"vendors":[],"products":[],"references":[{"url":"https://github.com/freescout-help-desk/freescout/commit/1f4deee6369d89a70d291248499883b5bfdb99ff","tags":[]},{"url":"https://github.com/freescout-help-desk/freescout/commit/656cb2349cd3bb11f04f01c1587900dfb423a855","tags":[]},{"url":"https://github.com/freescout-help-desk/freescout/releases/tag/1.8.226","tags":[]},{"url":"https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-gh3r-jh6q-wrvj","tags":[]}],"exploitRefs":[{"url":"https://github.com/freescout-help-desk/freescout/commit/1f4deee6369d89a70d291248499883b5bfdb99ff","tags":[]},{"url":"https://github.com/freescout-help-desk/freescout/commit/656cb2349cd3bb11f04f01c1587900dfb423a855","tags":[]},{"url":"https://github.com/freescout-help-desk/freescout/releases/tag/1.8.226","tags":[]},{"url":"https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-gh3r-jh6q-wrvj","tags":[]}],"hasPoc":true,"ai":null}