CVE-2026-75786: Pandora FMS SQL Injection Vulnerability

CVE-2026-75786 Overview

CVE-2026-75786 is an authenticated blind SQL injection vulnerability in Pandora FMS. The flaw resides in the Grafana datasource endpoint, where the module parameter is concatenated into a SQL query without sanitization. An authenticated attacker can inject arbitrary SQL fragments through this parameter to extract backend database contents using blind inference techniques. The vulnerability affects Pandora FMS versions 777 and later and is classified under [CWE-89] Improper Neutralization of Special Elements used in an SQL Command.

Critical Impact
Authenticated attackers can exfiltrate sensitive monitoring data, credentials, and configuration information stored in the Pandora FMS database through blind SQL injection against the Grafana datasource endpoint.

Affected Products

Pandora FMS version 777
Pandora FMS versions after 777
Deployments exposing the Grafana datasource integration endpoint

Discovery Timeline

2026-10-01 - CVE CVE-2026-75786 published to NVD
2026-10-01 - Last updated in NVD database

Technical Details for CVE-2026-75786

Vulnerability Analysis

The vulnerability exists in the Grafana datasource endpoint exposed by Pandora FMS. The endpoint accepts a module parameter from the client and incorporates it directly into a SQL query string. Because no parameterization or input validation is applied, attacker-controlled SQL syntax reaches the database engine.

Exploitation requires valid authentication credentials, which limits the attacker population to users with legitimate access or those who have obtained credentials through separate means. The injection is blind, meaning the application does not return query results directly. Attackers must use time-based or boolean-based inference techniques to extract data one bit at a time.

The confidentiality impact is high because the Pandora FMS database stores monitoring data, agent configurations, authentication material, and operational metadata across managed systems. Integrity and availability impact are limited based on the CVSS vector.

Root Cause

The root cause is unsafe string concatenation of the module parameter when constructing SQL statements in the Grafana datasource endpoint handler. Prepared statements or parameterized queries would eliminate the injection surface. The code also lacks allowlist validation on the parameter value before query construction.

Attack Vector

The attack vector is network-accessible with low attack complexity. An authenticated user issues a crafted HTTP request to the Grafana datasource endpoint. The request includes SQL syntax within the module parameter, which the backend concatenates into the query sent to the database. Blind inference payloads using conditional time delays or boolean responses allow progressive extraction of arbitrary tables and columns.

See the Pandora FMS Vulnerabilities Overview for vendor technical details.

Detection Methods for CVE-2026-75786

Indicators of Compromise

HTTP requests to the Grafana datasource endpoint containing SQL keywords such as UNION, SELECT, SLEEP, BENCHMARK, or CASE WHEN within the module parameter.
Unusually long response times for datasource requests, which indicate time-based blind SQL injection probing.
Repeated authenticated requests from a single session enumerating sequential character values, typical of blind data extraction.

Detection Strategies

Inspect web server and application logs for the Grafana datasource endpoint and flag non-alphanumeric payloads in the module parameter.
Deploy web application firewall rules that match common blind SQL injection patterns against Pandora FMS endpoints.
Correlate database query logs with application request logs to identify queries containing attacker-controlled syntax originating from the datasource handler.

Monitoring Recommendations

Enable verbose query logging on the Pandora FMS database and alert on malformed or unusually long SELECT statements referencing system tables.
Monitor authenticated session activity for anomalous request rates against /api/grafana or equivalent datasource routes.
Track failed and successful authentications preceding anomalous datasource queries to identify credential compromise.

How to Mitigate CVE-2026-75786

Immediate Actions Required

Apply the vendor security update once published by Pandora FMS by consulting the Pandora FMS Vulnerabilities Overview.
Restrict access to the Pandora FMS console to trusted networks using network segmentation or VPN enforcement.
Rotate credentials for any accounts that may have been exposed through the Pandora FMS database.

Patch Information

Refer to the Pandora FMS Vulnerabilities Overview for the authoritative list of fixed releases. Upgrade to a Pandora FMS build that explicitly addresses CVE-2026-75786. Verify the fix by confirming the Grafana datasource endpoint uses parameterized queries after the upgrade.

Workarounds

Disable the Grafana datasource integration if it is not required in the deployment.
Enforce least-privilege database accounts for the Pandora FMS application user to limit the data accessible through injection.
Deploy a web application firewall rule that blocks SQL metacharacters in the module parameter until the patch is applied.

bash

# Example WAF rule concept (ModSecurity-style) blocking SQL syntax in the module parameter
SecRule ARGS:module "@rx (?i)(union|select|sleep\(|benchmark\(|case\s+when|--|;)" \
    "id:1075786,phase:2,deny,status:403,msg:'Potential SQLi against Pandora FMS datasource endpoint (CVE-2026-75786)'"