What is CVE-2026-27637?

CVE-2026-27637 is a critical-severity vulnerability in Freescout, classified under Use of Insufficiently Random Values. CVSS score: 9.8/10. Published 2026-02-25.

How severe is CVE-2026-27637?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Freescout

CVE-2026-27637

FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.206, FreeScout's `TokenAuth` middleware uses a predictable authentication token computed as `MD5(user_id + created_at + APP_KEY)`. This…

EPSS: 0.007 (47.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Freescout
Freescout-help-desk Freescout — versions < 1.8.206

Weakness classification (CWE)

CWE-330 — Use of Insufficiently Random Values

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (x_refsource_MISC, Not Applicable)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2026-27637?: CVE-2026-27637 is a critical-severity vulnerability in Freescout, classified under Use of Insufficiently Random Values. CVSS score: 9.8/10. Published 2026-02-25.
How severe is CVE-2026-27637?: Critical severity. CVSS v3 base score is 9.8 out of 10.