linuxfabrik-lib: fetch() forwards credential headers across a cross-origin redirect
Priority LOW 27CWE-200Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · Low · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-200.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00497 42nd percentileScored 2026-11-07
Fix Fixed monitoring-plugins (Linuxfabrik): 6.0.0linuxfabrik-lib (PyPI): 6.0.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linuxfabrik | monitoring-plugins | before 6.0.0 | 6.0.0 | Patch available | CNA |
| — | linuxfabrik-lib (PyPI) | before 6.0.0 | 6.0.0 | Patch available | GHSA-4jc5-g844-4x33 |
- monitoring-plugins VendorLinuxfabrik Affected before 6.0.0 Fixed in 6.0.0 Patch available CNA
- linuxfabrik-lib (PyPI) Vendor— Affected before 6.0.0 Fixed in 6.0.0 Patch available GHSA-4jc5-g844-4x33
Remediation
- Fix · CNA monitoring-plugins (Linuxfabrik) Fixed in 6.0.0
- Fix · GHSA-4jc5-g844-4x33 linuxfabrik-lib (PyPI) Fixed in 6.0.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-67435
- 2026-10-03 Alias added: GHSA-4jc5-g844-4x33
References
More Linuxfabrik vulnerabilities
- TI-2026-39994 linuxfabrik-lib: Local privilege escalation using embedded command CVSS 3.1HIGH 7.8
- TI-2026-37926 Linuxfabrik Monitoring Plugins Sudoers: /usr/bin/apt-get arguments allow privilege escalation CVSS 4.0HIGH 7.0
- TI-2026-51979 linuxfabrik-lib: Arbitrary root file read via live --test argument (lib.lftest) across sudoers-whitelisted plugins (LPE) CVSS 3.1MEDIUM 5.5
- TI-2026-51978 Linuxfabrik Monitoring Plugins: Arbitrary root file disclosure via unconfined --filename in logfile plugin (sudoers LPE) CVSS 3.1MEDIUM 5.5
- TI-2026-38766 linuxfabrik-lib: Insecure creation of SQLite databases CVSS 4.0LOW 2.0
- TI-2026-47716 Linuxfabrik monitoring-plugins: SSRF and auth-token disclosure via unvalidated @odata.id link in redfish-* plugins CVSS 4.0HIGH 8.3
Sources
- CVE-2026-67435 · CVE Program
- CVE-2026-67435 · NVD
- FIRST EPSS
- GHSA-4jc5-g844-4x33 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences