What is CVE-2026-40568?

CVE-2026-40568 is a high-severity vulnerability in Freescout-help-desk Freescout, classified under Cross-site Scripting. CVSS score: 8.5/10. Published 2026-04-21.

How severe is CVE-2026-40568?

High severity. CVSS v3 base score is 8.5 out of 10.

XSS in Freescout-help-desk Freescout

CVE-2026-40568

FreeScout is a free self-hosted help desk and shared mailbox. Versions prior to 1.8.213 have a stored cross-site scripting (XSS) vulnerability in the mailbox signature feature. The sanitization function `Helper::stripDangerousTags()` (`app…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (12.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N.

Affected products

Freescout-help-desk Freescout — versions < 1.8.213

Weakness classification (CWE)

References

https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-w2f5-6wcv-677r (x_refsource_CONFIRM)
https://github.com/freescout-help-desk/freescout/commit/1d83e1cffb0bf8d109625313530b36b0f5910b3f (x_refsource_MISC)
https://github.com/freescout-help-desk/freescout/releases/tag/1.8.213 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-40568?: CVE-2026-40568 is a high-severity vulnerability in Freescout-help-desk Freescout, classified under Cross-site Scripting. CVSS score: 8.5/10. Published 2026-04-21.
How severe is CVE-2026-40568?: High severity. CVSS v3 base score is 8.5 out of 10.