What is the CVSS score of CVE-2026-26987?

CVE-2026-26987 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of SNMP are affected by CVE-2026-26987?

Organizations using LibreNMS should be aware of moderate risk from CVE-2026-26987, a cross-site scripting vulnerability rated CVSS 6.1.. A patch is available.

Is there a public PoC exploit available for CVE-2026-26987?

Yes, a public proof-of-concept exploit is available for CVE-2026-26987. Prioritise patching immediately. EPSS: 0.0%.

SNMP CVE-2026-26987

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2026-02-20 security-advisories@github.com

GHSA-gqx7-99jw-6fpr

XSS SNMP MySQL Librenms

6.1

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:04 vuln.today

PoC Detected

Feb 20, 2026 - 16:32 vuln.today

Public exploit code

Patch released

Feb 20, 2026 - 16:32 nvd

Patch available

CVE Published

Feb 20, 2026 - 02:16 nvd

MEDIUM 6.1

DescriptionNVD

LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. Versions 25.12.0 and below are vulnerable to Reflected XSS attacks via email field. This issue has been fixed in version 26.2.0.

AnalysisAI

Reflected cross-site scripting in LibreNMS versions 25.12.0 and earlier allows unauthenticated remote attackers to inject malicious scripts via the email field, potentially compromising user sessions and enabling credential theft or malware distribution. Public exploit code exists for this vulnerability, and affected organizations should upgrade to version 26.2.0 or later immediately.

RemediationAI

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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CVE-2026-26987 vulnerability details – vuln.today

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