CVE-2026-62851
FreeScout: Cross-mailbox conversation existence / internal-id disclosure via the search-by-number (`#`) shortcut (missing mailbox authorization)
FreeScout is a self-hosted help desk and shared mailbox. Prior to 1.8.226, the search-by-number shortcut in ConversationsController::search() resolves a user-controlled ticket number without applying the mailbox filter or view policy used by the normal search path. An authenticated non-admin agent who is a member of at least one mailbox can request /search with a hash-prefixed ticket number and use the 302 Location header to confirm that a conversation exists in a different mailbox the agent cannot access and learn its internal conversation and folder identifiers. The destination conversation remains protected, so this issue does not disclose message content, attachments, or customer data. This issue is fixed in version 1.8.226.
Fixes and workarounds
Fix
freescout-help-desk/freescout (self-hosted): GitHub reports patched versions 1.8.226. Check the advisory for the affected release branch.
Source: GitHub GHSA-wqq7-4q7m-273vAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| freescout freescout-help-desk |
< 1.8.226 (affected) | CNA: GitHub_M |
freescout-help-desk/freescoutfreescout-help-desk/freescout
self-hosted |
<1.8.226 (affected, GitHub advisory range) | GitHub GHSA-wqq7-4q7m-273v |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 4.3 medium |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N | CNA: GitHub_M |
| 3.1 / 4.3 medium |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N | NVD: [email protected] |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-wqq7-4q7m-273vCNA: GitHub_M · x_refsource_CONFIRM
- https://github.com/freescout-help-desk/freescout/commit/4e197d8ce97eb6610ef71402d8c2512824a9a1b5CNA: GitHub_M · x_refsource_MISC
- https://github.com/freescout-help-desk/freescout/releases/tag/1.8.226CNA: GitHub_M · x_refsource_MISC
- https://github.com/freescout-help-desk/freescout/commit/4e197d8ce97eb6610ef71402d8c2512824a9a1b5[email protected]
- https://github.com/freescout-help-desk/freescout/releases/tag/1.8.226[email protected]
- https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-wqq7-4q7m-273v[email protected]
- https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-wqq7-4q7m-273vGitHub Security Advisories · advisory
For agents and automation
Read public disclosures for free as Markdown or JSON. Compatible browsers also expose native WebMCP tools to search disclosures, read this page, and discover API access.
Use the ontology-linked Cyber API with x402 pay per request, or a Y2 Pro or Elite API key with the intel:cyber scope.
Endpoints and access details
https://api.y2.dev/api/v2/cyber/cveshttps://api.y2.dev/api/v2/cyber/cves/{cveId}
A workspace owner or admin can create a Pro or Elite API key. Send Authorization: Bearer <Y2_API_KEY> from your trusted agent runtime.
For x402, omit Authorization and read the HTTP 402 payment challenge before signing a retry. Public browser tools do not make payments.