Is this vulnerability remotely exploitable?

Yes. If the `ajax_table.php` endpoint is reachable over the network and accepts the IPv6 `address` parameter from user input, an attacker can exploit the vulnerability through crafted HTTP requests.

Does an attacker need to be authenticated?

That depends on how the LibreNMS instance is configured. If IPv6 search functionality is available to unauthenticated users, the attack can be anonymous; otherwise, any account with access to the vulnerable search feature may be able to exploit it.

What is the safest general fix pattern for this issue?

The most robust fix is to replace all dynamic SQL string concatenation involving user input with parameterized queries and enforce strict validation on address and prefix fields, ensuring they match expected IPv6 and prefix-length formats before query execution.

Severity:

CRITICAL RISK

(9.1)

SQL Injection (CWE-89) in LibreNMS ajax_table.php IPv6 Search

CVE-2026-26988

Published:

Feb 19, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

SQL Injection

CWE:

CWE-89

Impact:

Unauthorized Database Access and Manipulation

Severity:

CRITICAL RISK

(9.1)

CVSS Version:

3.1

Vulnerability Type

Category:

SQL Injection

CWE:

CWE-89

Impact:

Unauthorized Database Access and Manipulation

Severity:

CRITICAL RISK

(9.1)

CVSS Version:

3.1

Catch This CVE While Code Is Being Written

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SQL Injection (CWE-89) in LibreNMS ajax_table.php IPv6 Search

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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