CVE-2026-40520HIGH 8.8EPSS p68.5%
CVE-2026-40520CVE-2026-40520
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.
Scoring
| CVSS 3.1 | 8.8 (HIGH) |
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 1.38% probability of exploitation · percentile 68.5% · 2026-06-19T12:03:05Z |
| Published | 2026-04-21 |
| Last modified | 2026-04-23 |
Underlying weaknesses· 1
References
- https://github.com/FreePBX/api/blob/5f194e39a47e5481e8947f9694304d32724175f6/Api.class.php#L546C1-L554C3
- https://github.com/FreePBX/api/blob/5f194e39a47e5481e8947f9694304d32724175f6/ApiGqlHelper.class.php#L34C1-L36C136
- https://github.com/FreePBX/api/commit/5f194e39a47e5481e8947f9694304d32724175f6
- https://www.vulncheck.com/advisories/freepbx-api-module-command-injection-via-graphql
1
| Type | Target | Confidence | Tier |
|---|---|---|---|
| Weakness | Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')cwe-78 | 0% | live |
Related by meaning· 6
Nearest entities by semantic similarity across the cs-graph corpus.