TI-2026-86034 Aliases CVE-2026-62852

Missing authorization in FreeScout exposes conversation data to restricted users

LOW 28CWE-200Published 2026-11-06 · Updated 2026-11-06

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Information disclosure, Security bypass
Confidentiality · integrity · availability: High · None · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-200 and CWE-639.

Summary

FreeScout, a self-hosted help desk and shared mailbox, is affected before 1.8.226. The RealtimeConvNewThread handler checks only general mailbox access and skips the conversation-level restriction for users who see only assigned conversations (CWE-862). A restricted authenticated user can subscribe to predictable conversation channels in the same mailbox and receive replies, internal notes, recipient addresses, and attachment download URLs for conversations they should not see (CWE-200, CWE-639).

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

FreeScout is a self-hosted help desk and shared mailbox. Prior to 1.8.226, RealtimeConvNewThread checks only general mailbox access and does not apply the conversation-level restriction for users configured to see only assigned conversations. A restricted authenticated user can subscribe to predictable conv.<conversation_id> Polycast channels for other conversations in the same mailbox. New event payloads can expose complete replies, internal notes, recipient addresses, conversation state, assignee data, attachment names, and attachment URLs containing valid download tokens. This issue is fixed in version 1.8.226.

Why it matters now

EPSS 0.00231 13th percentileScored 2026-11-07

Fix Fixed freescout (freescout-help-desk): 1.8.226

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
freescout-help-desk	freescout	before 1.8.226	1.8.226	Patch available	CNA

freescout Vendorfreescout-help-desk Affected before 1.8.226 Fixed in 1.8.226 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:freescout:freescout::::::::	—	—	freescout-help-desk

cpe:2.3:a:freescout:freescout:*:*:*:*:*:*:*:* Versions — — ·freescout-help-desk

Remediation

Upgrade FreeScout to version 1.8.226.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Fix · CNA freescout (freescout-help-desk) Fixed in 1.8.226

Timeline

2026-11-06 Threatist record created from CVE-2026-62852
2026-11-08 Priority changed: MEDIUM → LOW

References

Other 3

TI-2026-38652 FreeScout vulnerable to anonymous account takeover via /user-setup empty invite_hash on MySQL CVSS 3.1CRITICAL 9.4
TI-2026-22019 FreeScout's Predictable Authentication Token Enables Account Takeover CVSS 3.1CRITICAL 9.8
TI-2026-30304 FreeScout's user invitation hash never expires: permanent unauthenticated account takeover if invite link leaks CVSS 3.1CRITICAL 9.1
TI-2026-29249 FreeScout has Authentication Bypass and Information Disclosure in SystemController via /system/cron CVSS 4.0HIGH 8.9
TI-2026-29247 FreeScout has Predictable Attachment Token that Allows Unauthenticated Private File Download via Brute Force CVSS 4.0HIGH 8.8
TI-2026-38648 FreeScout Vulnerable to Unauthenticated Conversation Thread Injection via HMAC Length Bypass in FetchEmails CVSS 3.1HIGH 8.6

See all 90 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences