CVE-2026-40520

FreePBX api module version 17.0.8 and prior contain a command injection vulnerability in the initiateGqlAPIProcess() function where GraphQL mutation input fields are passed directly to shell_exec() without sanitization or escaping. An authenticated user with a valid bearer token can send a GraphQL moduleOperations mutation with backtick-wrapped commands in the module field to execute arbitrary commands on the underlying host as the web server user.

CVSS v3 7.2 HIGH

7.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/FreePBX/api/blob/5f194e39a47e5481e8947f9694304d32724175f6/Api.class.php#L546C1-L554C3	Product
https://github.com/FreePBX/api/blob/5f194e39a47e5481e8947f9694304d32724175f6/ApiGqlHelper.class.php#L34C1-L36C136	Product
https://github.com/FreePBX/api/commit/5f194e39a47e5481e8947f9694304d32724175f6	Patch
https://www.vulncheck.com/advisories/freepbx-api-module-command-injection-via-graphql	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:freepbx:api:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-04-21 13:16

Updated : 2026-07-14 21:16

NVD link : CVE-2026-40520

Mitre link : CVE-2026-40520

CVE.ORG link : CVE-2026-40520

JSON object : View

Products Affected

freepbx

api

CWE

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

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