How severe is CVE-2026-27636?

CVE-2026-27636 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-27636 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27636?

CVE-2026-27636 affects Freescout. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-27636?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-27636 have an EU (EUVD) identifier?

Yes. CVE-2026-27636 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8612.

When was CVE-2026-27636 published?

CVE-2026-27636 was published on 2026-02-25 and last updated on 2026-06-17.

CVE-2026-27636

CVE-2026-27636 is a high-severity vulnerability in Freescout with a CVSS 3.x base score of 8.8. 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-434.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-8612
Weakness: CWE-434
Affected product: Freescout
Published: 2026-02-25
Last modified: 2026-06-17

Description

FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.206, FreeScout's file upload restriction list in `app/Misc/Helper.php` does not include `.htaccess` or `.user.ini` files. On Apache servers with `AllowOverride All` (a common configuration), an authenticated user can upload a `.htaccess` file to redefine how files are processed, enabling Remote Code Execution. This vulnerability can be exploited on its own or in combination with CVE-2026-27637. Version 1.8.206 fixes both vulnerabilities.

Frequently asked questions

What is CVE-2026-27636?: FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.206, FreeScout's file upload restriction list in `app/Misc/Helper.php` does not include `.htaccess` or `.user.ini` files. On Apache servers with `AllowOverride All` (a common configuration), an authenticated user can upload a `.htaccess` file to redefine how files are processed, enabling Remote Code Execution. This vulnerability can be exploited on its own or in combination with CVE-2026-27637. Version 1.8.206 fixes both vulnerabilities.
How severe is CVE-2026-27636?: CVE-2026-27636 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-27636 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27636?: CVE-2026-27636 affects Freescout. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-27636?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-27636 have an EU (EUVD) identifier?: Yes. CVE-2026-27636 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8612.
When was CVE-2026-27636 published?: CVE-2026-27636 was published on 2026-02-25 and last updated on 2026-06-17.

References

Affected products (1)

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

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