Laravel
CVE-2026-27637
CRITICAL
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
4DescriptionGitHub Advisory
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.
AnalysisAI
Predictable password reset tokens in FreeScout help desk before 1.8.206. Weak random number generation allows attackers to predict reset tokens and take over accounts. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | FreeScout versions prior to 1.8.206 with exposed APP_KEY (common in Laravel deployments where .env or configuration files are accessible via directory traversal, git exposure, or misconfigured web servers). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 9.8, EPSS 0.19%. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Attacker triggers password reset for admin account, predicts the reset token based on weak PRNG, completes the reset to take over the account. |
| Remediation | Update to FreeScout 1.8.206. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all FreeScout installations and their versions; isolate or disable public-facing instances running versions before 1.8.206. …
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External POC / Exploit Code
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