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CVE-2026-27637

FreeScout's Predictable Authentication Token Enables Account Takeover

Published: Feb 25, 2026Updated: Feb 26, 2026 Sources: CVE List NVDCWE-330
NVD MITRE
9.8CVSSCRITICAL
EPSS Score
0.7%
Top 53.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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 Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-330

Affected Products

freescoutfreescout
Mixed
Enterprise Software / itsm-monitoring
freescoutfreescout-help-desk
On-premWeb App
Enterprise Software / itsm-monitoring
freescoutcommercialEnterprise Softwareaka freescout
freescout-help-deskcommercialEnterprise Software

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Credential Access
View detailed technique mapping

References

https://github.com/freescout-help-desk/freescout/commit/004a8231f6e413af1d4680930b0e2342fd4283f9
github.com
https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-6gcm-v8xf-j9v9
github.com
https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-mw88-x7j3-74vc
github.com

Timeline

Published
Feb 25, 2026
Last Updated
Feb 26, 2026

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