CVE-2026-73974Public exploit

Local root file read via --test path

Published Aug 18, 2026 · Updated Aug 19, 2026

Path traversal in Linuxfabrik linuxfabrik-lib before 6.1.0 allows local users to read root-readable files via --test. In Linuxfabrik Monitoring Plugins before 7.0.0, lib.lftest.test() treats the first or second CSV element of the hidden but live --test argument as a filesystem path and returns that file's contents as simulated stdout or stderr without confining resolution to a plugin fixture directory; network-bonding and openstack-swift-stat originally bypassed the helper with direct reads. Reachability requires control of the nagios or icinga account on systems that allow the affected plugins to run through passwordless sudo, letting deb-updates disclose whole files and other plugins expose filtered content or a root file existence and readability oracle.

CVSS severity5.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Linuxfabrik linuxfabrik-lib before 6.1.0 allows local users to read root-readable files via --test. In Linuxfabrik Monitoring Plugins before 7.0.0, lib.lftest.test() treats the first or second CSV element of the hidden but live --test argument as a filesystem path and returns that file's contents as simulated stdout or stderr without confining resolution to a plugin fixture directory; network-bonding and openstack-swift-stat originally bypassed the helper with direct reads. Reachability requires control of the nagios or icinga account on systems that allow the affected plugins to run through passwordless sudo, letting deb-updates disclose whole files and other plugins expose filtered content or a root file existence and readability oracle.

The record

CVE
CVE-2026-73974
Published
Aug 18, 2026
Updated
Aug 19, 2026
Vendor
Linuxfabrik
Product
Linuxfabrik Monitoring Plugins
Classifications
CWE-269, CWE-22, T1005
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 7.0.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Linuxfabrik · Linuxfabrik Monitoring Pluginsversion=< 7.0.0
Linuxfabrik · linuxfabrik-libversion=< 6.0.1

Published CVSS scores

5.5GitHub, Inc.CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-269Improper Privilege Management
CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1005Data from Local System

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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