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CVE-2026-40565

6.1 · MEDIUM

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

Published Apr 21, 2026CWE-79EPSS 0.33%

Overview

CVE-2026-40565 is a medium-severity vulnerability. It was published on April 21, 2026 and has a CVSS 3.1 base score of 6.1 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.1, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.213, FreeScout's linkify() function in app/Misc/Helper.php converts plain-text URLs in email bodies into HTML anchor tags without escaping double-quote characters (") in the URL. HTMLPurifier (called first via getCleanBody()) preserves literal " characters in text nodes. linkify() then wraps URLs including those " chars inside an unescaped href="..." attribute, breaking out of the href and injecting arbitrary HTML attributes. Version 1.8.213 fixes the issue.

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/265379b3ae343f06846adc0aa8510643d1eac2dfGitHubgithub.com/freescout-help-desk/freescout/releases/tag/1.8.213GitHubgithub.com/freescout-help-desk/freescout/security/advisories/GHSA-49pm-xwqj-vwjpGitHubgithub.com/freescout-help-desk/freescout/security/advisories/GHSA-49pm-xwqj-vwjp

How CyberStrike helps

Frequently asked questions

What is CVE-2026-40565?

CVE-2026-40565 is a medium-severity vulnerability. It was published on April 21, 2026 and has a CVSS 3.1 base score of 6.1 (MEDIUM).

How severe is CVE-2026-40565?

This vulnerability has a CVSS 3.1 base score of 6.1, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-40565?

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-2026-40565?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-40565 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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