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No exploitation reportedAwaiting NVD analysis

CVE-2026-62856

FreeScout: Cross-User Notification Data Disclosure via LIKE Wildcard Injection in Polycast Channel Query

No exploitation reported by the sources we read.

  • Published2026-11-06
  • WeaknessCWE-200 · CWE-639 · CWE-89

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2026-11-0617:00CVE publishedCNA

Versions per branch

Products declared by the CNA

As GitHub_M, the CNA that assigned this CVE, declared them in the CVE record; versions as written. NVD lists no product for this CVE yet: this is the only product data so far.

  • freescout-help-desk freescout
    Affected
    • = < 1.8.226no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-06

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-62856 yet.

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Metasploit modules
none listed
Metasploit Framework

Sources

  • CNACVSS 3.17.72026-11-06
  • CNAweakness (CWE)CWE-200, CWE-639, CWE-892026-11-06
  • NVDweakness (CWE)CWE-200, CWE-639, CWE-89read 2026-11-06

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Published
2026-11-06
Last Modified
2026-11-06
NVD status
Received

Frequently asked questions

What is CVE-2026-62856?

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.

Is CVE-2026-62856 actively exploited?

Active exploitation of CVE-2026-62856 has not been confirmed.

What is the CVSS score for CVE-2026-62856?

CVE-2026-62856 has a CVSS v3 base score of 7.7 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.

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