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CVE-2026-40592

5.9 · MEDIUM

FreeScout is a free self-hosted help desk and shared mailbox.

Published Apr 21, 2026CWE-862EPSS 0.36%

Overview

CVE-2026-40592 is a medium-severity vulnerability. It was published on April 21, 2026 and has a CVSS 3.1 base score of 5.9 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.214, the undo-send route `GET /conversation/undo-reply/{thread_id}` checks only whether the current user can view the parent conversation. It does not verify that the current user created the reply being undone. In a shared mailbox, one agent can therefore recall another agent's just-sent reply during the 15-second undo window. Version 1.8.214 fixes the vulnerability.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/freescout-help-desk/freescout/commit/c779afdda86fa00a4b85779e034bbfd9ce20c76dGitHubgithub.com/freescout-help-desk/freescout/releases/tag/1.8.214GitHubgithub.com/freescout-help-desk/freescout/security/advisories/GHSA-674v-r6xp-mvp6

How CyberStrike helps

Frequently asked questions

What is CVE-2026-40592?

CVE-2026-40592 is a medium-severity vulnerability. It was published on April 21, 2026 and has a CVSS 3.1 base score of 5.9 (MEDIUM).

How severe is CVE-2026-40592?

This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-40592?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-40592?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-40592 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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