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CVE-2026-40520

HIGH

7.2

Description

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.

CVE Details

CVSS v3.1 Score7.2

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredHIGH

User InteractionNONE

Published4/21/2026

Last Modified4/23/2026

Sourcenvd

Honeypot Sightings0

Affected Products

freepbx:api

Weaknesses (CWE)

CWE-78

References

https://github.com/FreePBX/api/blob/5f194e39a47e5481e8947f9694304d32724175f6/Api.class.php#L546C1-L554C3(disclosure@vulncheck.com)

https://github.com/FreePBX/api/blob/5f194e39a47e5481e8947f9694304d32724175f6/ApiGqlHelper.class.php#L34C1-L36C136(disclosure@vulncheck.com)

https://github.com/FreePBX/api/commit/5f194e39a47e5481e8947f9694304d32724175f6(disclosure@vulncheck.com)

https://www.vulncheck.com/advisories/freepbx-api-module-command-injection-via-graphql(disclosure@vulncheck.com)

IOC Correlations

No correlations recorded

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