CVE-2026-85744
FreeScout: Conversation Merge Cross-Mailbox Authorization Bypass
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| freescout freescout-help-desk |
< 1.8.227 (affected) | CNA: GitHub_M |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 5.4 medium |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L | CNA: GitHub_M |
| 3.1 / 5.4 medium |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L | 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-v8vc-cmf9-gg2cCNA: GitHub_M · x_refsource_CONFIRM
- https://github.com/freescout-help-desk/freescout/commit/7c485c96bef7188c276906200250ce9d8a2bdfebCNA: GitHub_M · x_refsource_MISC
- https://github.com/freescout-help-desk/freescout/releases/tag/1.8.227CNA: GitHub_M · x_refsource_MISC
- https://github.com/freescout-help-desk/freescout/commit/7c485c96bef7188c276906200250ce9d8a2bdfeb[email protected]
- https://github.com/freescout-help-desk/freescout/releases/tag/1.8.227[email protected]
- https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-v8vc-cmf9-gg2c[email protected]
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