How severe is CVE-2026-26990?

CVE-2026-26990 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-26990 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-26990?

CVE-2026-26990 affects Librenms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-26990?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-26990 have an EU (EUVD) identifier?

Yes. CVE-2026-26990 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8037.

When was CVE-2026-26990 published?

CVE-2026-26990 was published on 2026-02-20 and last updated on 2026-06-17.

CVE-2026-26990

CVE-2026-26990 is a high-severity vulnerability in Librenms with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-89.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-8037
Weakness: CWE-89
Affected product: Librenms
Published: 2026-02-20
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-26990?: 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.
How severe is CVE-2026-26990?: CVE-2026-26990 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-26990 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-26990?: CVE-2026-26990 affects Librenms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-26990?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-26990 have an EU (EUVD) identifier?: Yes. CVE-2026-26990 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8037.
When was CVE-2026-26990 published?: CVE-2026-26990 was published on 2026-02-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:*

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