No exploitation reportedFix available

CVE-2026-26990

Q: Is CVE-2026-26990 actively exploited?

Active exploitation of CVE-2026-26990 has not been confirmed. Its EPSS score was 4.5% on 2026-10-25, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2026-26990?

CVE-2026-26990 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2026-02-20
Fixed in26.2.0
WeaknessCWE-89

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2026-02-2002:16CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-25 15:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-26990?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-26990?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Librenms

Branch	Affected	Fixed in	Source
26.2	< 26.2.0	26.2.0	NVD · OSV

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Librenms to 26.2.0

Advisories and patches

github.comPatch

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVE recordread 2026-10-23
CISA-ADPSSVC decisionnone2026-02-20
OpenCVESSVC decisionnone—
CNACVSS 3.18.8read 2026-10-23
CNAweakness (CWE)CWE-89read 2026-10-23
FIRST EPSSEPSS score4.5 %2026-10-25
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published: 2026-02-20
Last Modified: 2026-06-17
NVD status: Analyzed

Frequently asked questions

What is CVE-2026-26990?

Is CVE-2026-26990 actively exploited?

Active exploitation of CVE-2026-26990 has not been confirmed. Its EPSS score was 4.5% on 2026-10-25, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-26990?

CVE-2026-26990 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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