Critical 9.8Published Feb 24, 2026

CVE-2026-27637FreeScout's Predictable Authentication Token Enables Account Takeover

Updated under an hour ago (Oct 26, 2026, 9:00 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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 token is static (never expires/rotates), and if an attacker obtains the `APP_KEY` — a well-documented and common exposure vector in Laravel applications — they can compute a valid token for any user, including the administrator, achieving full account takeover without any password. This vulnerability can be exploited on its own or in combination with CVE-2026-27636. Version 1.8.206 fixes both vulnerabilities.

CVSS: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-330
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Feb 25, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

freescout-help-desk freescout freescout_help_desk:freescout (from the name)	before 1.8.206	CNA record
freescout freescout freescout:freescout	before 1.8.206	NVD

References

References

https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-6gcm-v8xf-j9v9	x-refsource-confirm, exploit, vendor-advisory
https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-mw88-x7j3-74vc	x-refsource-misc, not-applicable
https://github.com/freescout-help-desk/freescout/commit/004a8231f6e413af1d4680930b0e2342fd4283f9	x-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.