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  4. CVE 2026 62856 freescout cross user notification data disclosure
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Back to active CVEs
High · CVSS 7.7CVE-2026-62856

FreeScout: Cross-User Notification Data Disclosure via LIKE Wildcard Injection in Polycast Channel QueryCVE-2026-62856

Answer in brief

CVE-2026-62856 records a High severity (CVSS 7.7) vulnerability in FreeScout: Cross-User Notification Data Disclosure via LIKE Wildcard Injection in Polycast Channel Query. The current sources do not mark it as known exploited. The current feed maps freescout-help-desk/freescout (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 6, 2026Updated Nov 6, 2026Source checked Nov 6, 2026First seen by HOL Nov 6, 2026Material review Nov 6, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.7
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 7.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps freescout-help-desk/freescout (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
freescout-help-desk/freescoutgeneric<1.8.2261.8.226

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for freescout-help-desk/freescout.
  2. 2Review the reported fix. Update freescout-help-desk/freescout to 1.8.226 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Nov 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 6, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • FreeScout: Incomplete fix for CVE-2026-40570: load_customer_info exposes cross-visibility customer PIISame freescout-help-desk/freescout package
  • FreeScout: a restricted agent can lift their own admin-imposed "see only assigned conversations" restriction via profile saveSame freescout-help-desk/freescout package
  • FreeScout: Administrative tools.php endpoint is accessible to low-privileged users, enabling filesystem enumeration and unthrottled brute-force of application secretsSame freescout-help-desk/freescout package
  • FreeScout: Cross-mailbox conversation existence / internal-id disclosure via the search-by-number (`#`) shortcut (missing mailbox authorization)Same freescout-help-desk/freescout package
  • FreeScout: Missing Authorization and Exposure of Sensitive Information to an Unauthorized Actor and Authorization Bypass Through User-Controlled KeySame freescout-help-desk/freescout package
  • FreeScout: Stored XSS in mailbox signature via same-origin JS uploadSame freescout-help-desk/freescout package

Record context

Vulnerability class
SQL Injection
EPSS
Not reported
CWE IDs
CWE-89, CWE-200, CWE-639
Source
CVE List V5
Source checked
Nov 6, 2026
References
4 linked sources
Open source record