CVE-2026-86427

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    CVE-2026-86427

    Published: 7 Sept 2026Last Modified: 20 Sept 2026

    Summary: LibreNMS before 26.8.0 Argument Injection via graph_title

    Details: LibreNMS before 26.8.0 contains an argument injection vulnerability in the graph_title parameter that allows authenticated attackers to inject arbitrary rrdtool arguments by breaking out of double-quote escaping. Attackers can inject DEF and LINE arguments to read RRD files from unauthorized devices, or use newline injection to execute arbitrary rrdtool commands, bypassing per-device authorization checks.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86427.json, https://github.com/librenms/librenms/security/advisories/GHSA-3hvv-wxpw-cx83, https://nvd.nist.gov/vuln/detail/CVE-2026-86427, https://www.vulncheck.com/advisories/librenms-before-26.8.0-argument-injection-via-graph-title

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -d2b6e2557b637a606612959e6007150c3726fb43

    Affected versions

    26.7.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-86427 | CVE-DB