# CVE-2026-26990: LibreNMS has Time-Based Blind SQL Injection in address-search.inc.php

> Authenticated attackers can extract database information via time-based blind SQL injection in LibreNMS address search functionality.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 20 Feb 2026
- **Updated:** 20 Feb 2026
- **Also known as:** GHSA-79q9-wc6p-cf92

## What is CVE-2026-26990?

CVE-2026-26990 is a high-severity SQL injection vulnerability in Librenms Librenms, published on 20 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. Versions 25.12.0 and below have a Time-Based Blind SQL Injection vulnerability in address-search.inc.php via the address parameter. When a crafted subnet prefix is supplied, the prefix value is concatenated directly into an SQL query without proper parameter binding, allowing an attacker to manipulate query logic and infer database information through time-based conditional responses. This vulnerability requires authentication and is exploitable by any authenticated user. This issue has been fixedd in version 26.2.0.

Weakness: CWE-89 (Improper Neutralization of Special Elements used in an SQL Command)

## Which versions are affected by CVE-2026-26990?

2 open source packages ship an affected version, including librenms/librenms. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `librenms/librenms` | Packagist | All versions | 26.2.0 |
| `librenms/librenms` | Packagist | All versions | 26.2.0 |

Products: Librenms Librenms.

## How do I fix CVE-2026-26990?

Upgrade librenms/librenms to 26.2.0 or later.

## Is CVE-2026-26990 being exploited?

There is no known exploitation of CVE-2026-26990 in the wild and no public exploit code.

## Other vulnerabilities in Librenms Librenms

- [CVE-2023-4982](https://insights.sbomify.com/CVE-2023-4982/): Cross-site Scripting (XSS) - Stored in librenms/librenms (critical 9.8)
- [CVE-2022-29712](https://insights.sbomify.com/CVE-2022-29712/): Command injection in librenms (critical 9.8)
- [CVE-2021-44278](https://insights.sbomify.com/CVE-2021-44278/): Path traversal in librenms/librenms (critical 9.8)
- [CVE-2019-10665](https://insights.sbomify.com/CVE-2019-10665/): LibreNMS Information Disclosure (critical 9.8)
- [CVE-2018-20434](https://insights.sbomify.com/CVE-2018-20434/): LibreNMS arbitrary OS commands execution (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-26990 and fix it if it is affected.

What it is: CVE-2026-26990 is a high-severity SQL injection vulnerability in Librenms Librenms, published on 20 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-26990 in the wild and no public exploit code.

Affected packages and fixed versions:
- librenms/librenms (Packagist): affected all versions; fixed in 26.2.0
- librenms/librenms (Packagist): affected all versions; fixed in 26.2.0

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-26990/ (Markdown: https://insights.sbomify.com/CVE-2026-26990/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-26990
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-26990
- OSV: https://osv.dev/vulnerability/CVE-2026-26990

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-26990/
Summaries are generated and may contain mistakes; the official description above is the record.