CVE-2026-27637
CRITICALFreeScout < 1.8.206 - Predictable Token Authentication Bypass via MD5 Token
Title source: llmDescription
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.
References (3)
Core 3
Core References
Vendor Advisory x_refsource_confirm
https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-6gcm-v8xf-j9v9
Vendor Advisory x_refsource_misc
https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-mw88-x7j3-74vc
Scores
CVSS v3
9.8
EPSS
0.0067
EPSS Percentile
46.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
total
Details
CWE
CWE-330
Status
published
Products (1)
freescout/freescout
< 1.8.206
Published
Feb 25, 2026
Tracked Since
Feb 25, 2026