# CVE-2026-109353: LibreNMS SQL injection in notifications.inc.php

Source: https://junglewise.ai/threats/cve-2026-109353-librenms-before-26-9-0-contains-an-sql-injection-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-12. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-109353 · Severity: high · CVSS 7.1 · Published 2026-10-12

LibreNMS is an open-source network monitoring platform. An unprivileged user can inject arbitrary SQL commands through the notification_id parameter, allowing them to read sensitive data like user password hashes from the database. The leaked information is persisted in a readable location, enabling attackers without administrator access to extract credentials and compromise other accounts.

Technologies: [Librenms](https://junglewise.ai/threats/technologies/librenms). Vendors: [Librenms](https://junglewise.ai/threats/vendors/librenms).

## Quick answers

**Is CVE-2026-109353 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-109353 being exploited in the wild.

**How severe is CVE-2026-109353?** High severity, with a CVSS score of 7.1, published 12 October 2026.

**Which products and versions are affected?** Librenms before 26.9.0.

**Is there a fix for CVE-2026-109353?** Yes: fixed in 26.9.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-109353 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-109353?** Check whether you run Librenms at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 26.9.0

## Technical details

An array-valued notification_id parameter in includes/html/forms/notifications.inc.php is directly interpolated into a SQL query without proper validation, allowing SQL injection at unprivileged access level (CWE-89). The vulnerability enables arbitrary cross-table reads; attackers can extract user.password hashes by injecting a SELECT subquery, with results persisted in notifications_attribs where they are readable through the web interface, bypassing blind SQL oracle requirements.

## Affected products

- LibreNMS LibreNMS before 26.9.0

## Timeline

- 2026-09-23: disclosed
- 2026-10-12: advisory

## References

- [https://github.com/librenms/librenms/security/advisories/GHSA-2pw7-8mmj-gcw5](https://github.com/librenms/librenms/security/advisories/GHSA-2pw7-8mmj-gcw5)
- [https://www.vulncheck.com/advisories/librenms-before-26.9.0-sql-injection-via-notification-id-in-notifications-inc-php](https://www.vulncheck.com/advisories/librenms-before-26.9.0-sql-injection-via-notification-id-in-notifications-inc-php)

## Related threats

- [LibreNMS LDAP filter injection in external authorization modes](https://junglewise.ai/threats/cve-2026-109357-librenms-before-26-9-0-contains-an-ldap-filter-injection-in-ldap)
- [LibreNMS missing authorization in PortsController::purge](https://junglewise.ai/threats/cve-2026-109356-librenms-before-26-9-0-contains-a-missing-authorization)
- [LibreNMS stored cross-site scripting in Oxidized node list](https://junglewise.ai/threats/cve-2026-109355-librenms-before-26-9-0-contains-a-stored-cross-site-scripting)
- [LibreNMS path traversal in NFSen channel parameter](https://junglewise.ai/threats/cve-2026-109354-librenms-before-26-9-0-contains-a-path-traversal-vulnerability)
- [LibreNMS stored cross-site scripting in wireless sensor description](https://junglewise.ai/threats/cve-2026-109352-librenms-before-26-9-0-contains-a-stored-cross-site-scripting)