Medium 6.0Published Jul 29, 2026

CVE-2026-67435linuxfabrik-lib: fetch() forwards credential headers across a cross-origin redirect

Updated under an hour ago (Oct 26, 2026, 1:50 PM ET)

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It affects Linuxfabrik monitoring-plugins. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Linuxfabrik monitoring-plugins

Exploited in the last 30 days

linuxfabrik-lib provides Python modules for database access, caching, shell execution, and API integrations. Prior to version 6.0.0, lib.url.fetch() followed cross-origin redirects while forwarding caller-supplied credential headers other than Authorization and Cookie, allowing a malicious redirect-capable server to receive headers such as X-Auth-Token from authenticated monitoring requests. This issue is fixed in version 6.0.0.

CVSS: 6.0 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
Weakness (CWE): CWE-200, CWE-918
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Jul 29, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linuxfabrik monitoring-plugins linuxfabrik:monitoring_plugins (from the name)	before 6.0.0	CNA record

References

References

https://github.com/Linuxfabrik/monitoring-plugins/security/advisories/GHSA-4jc5-g844-4x33	x-refsource-confirm
https://github.com/Linuxfabrik/lib/commit/6573ff9347e541200305d278d2663d2e54e052ff	x-refsource-misc
https://github.com/Linuxfabrik/lib/releases/tag/v6.0.0	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.