# CVE-2026-85744: FreeScout: Conversation Merge Cross-Mailbox Authorization Bypass

Status: published. Published: 2026-11-06. Updated: 2026-11-09.

FreeScout is a self-hosted help desk and shared mailbox. Prior to 1.8.227, the conversation_merge action records a failed authorization check for the target conversation in response['msg'] and then clears that value inside the source-conversation loop. An authenticated agent can merge a conversation they control into a target conversation in a mailbox they cannot access. The operation injects threads, attachments, and audit records into the unauthorized target and deletes the source conversation, but it does not disclose the target's existing contents. This issue is fixed in version 1.8.227.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- freescout-help-desk / freescout: < 1.8.227 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 3.1: 5.4 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L; source: CNA: GitHub_M

- CVSS 3.1: 5.4 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L; source: NVD: security-advisories@github.com

- CISA KEV: No listing in collected sources

- EPSS: 0.21% as of 2026-11-09; percentile 11.46%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-863

## 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-v8vc-cmf9-gg2c (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/freescout-help-desk/freescout/commit/7c485c96bef7188c276906200250ce9d8a2bdfeb (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/freescout-help-desk/freescout/releases/tag/1.8.227 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/freescout-help-desk/freescout/commit/7c485c96bef7188c276906200250ce9d8a2bdfeb (security-advisories@github.com)

- https://github.com/freescout-help-desk/freescout/releases/tag/1.8.227 (security-advisories@github.com)

- https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-v8vc-cmf9-gg2c (security-advisories@github.com)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-85744; retrieved 2026-11-09; source updated 2026-11-09

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-85744; retrieved 2026-11-10; source updated 2026-11-09

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-85744; retrieved 2026-11-09; source updated Not reported

Revision: 91265b707be197ce739a855275b16fb0269f07394fb40db98f0dadb46bddb2ac

Canonical: https://y2.dev/cve/CVE-2026-85744

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.