How severe is CVE-2026-40565?

CVE-2026-40565 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-40565 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-40565?

CVE-2026-40565 affects Freescout. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-40565?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-40565 have an EU (EUVD) identifier?

Yes. CVE-2026-40565 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-24141.

When was CVE-2026-40565 published?

CVE-2026-40565 was published on 2026-04-21 and last updated on 2026-06-17.

CVE-2026-40565

CVE-2026-40565 is a medium-severity vulnerability in Freescout with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-24141
Weakness: CWE-79
Affected product: Freescout
Published: 2026-04-21
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-40565?: 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.
How severe is CVE-2026-40565?: CVE-2026-40565 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-40565 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-40565?: CVE-2026-40565 affects Freescout. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-40565?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-40565 have an EU (EUVD) identifier?: Yes. CVE-2026-40565 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-24141.
When was CVE-2026-40565 published?: CVE-2026-40565 was published on 2026-04-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:freescout:freescout:*:*:*:*:*:*:*:*

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