CVE-2026-67435
MEDIUMlinuxfabrik-lib: fetch() forwards credential headers across a cross-origin redirect
Title source: cnaDescription
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.
References (3)
Core 3
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/Linuxfabrik/monitoring-plugins/security/advisories/GHSA-4jc5-g844-4x33
X_Refsource_Misc x_refsource_misc
https://github.com/Linuxfabrik/lib/commit/6573ff9347e541200305d278d2663d2e54e052ff
X_Refsource_Misc x_refsource_misc
https://github.com/Linuxfabrik/lib/releases/tag/v6.0.0
Scores
CVSS v4
6.0
EPSS
0.0029
EPSS Percentile
20.9%
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-200
CWE-918
Status
published
Products (2)
Linuxfabrik/monitoring-plugins
< 6.0.0
pypi/linuxfabrik-lib
0 - 6.0.0PyPI
Published
Jul 29, 2026
Tracked Since
Jul 30, 2026