CVE-2026-53759
linuxfabrik-lib provides Python modules for database access, caching, shell execution, and API integrations. Prior to version 4.2.0, db_sqlite.py created SQLite databases at predictable paths in the shared /tmp directory and followed attacker-created symbolic links at those paths. An attacker who controls a local monitoring account can create a symlink such as /tmp/linuxfabrik-monitoring-plugins-docker-stats.db and then trigger a sudo-authorized plugin, causing the root process to create or modify the symlink target. The primitive can overwrite arbitrary paths, cause denial of service, or manipulate an existing SQLite database through a crafted rollback journal or write-ahead log. The Monitoring Plugins integration also moved plugin caches through lib.db_sqlite.get_db_path() so they use the secured per-user directory. This issue is fixed in version 4.2.0.
- CVSS 4.0
- 2.0
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P - EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 8% of CVEs (scores of 2026-10-25)
- CWE
- CWE-377
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-r35r-fpx2-jgr4 | PyPI | linuxfabrik-lib | <4.2.0 | 4.2.0 |
| PYSEC-2026-2596 | PyPI | linuxfabrik-lib | <4.2.0 | 4.2.0 |
References
- https://github.com/Linuxfabrik/lib/blob/main/CHANGELOG.md#v420---2026-06-02
- https://github.com/Linuxfabrik/lib/commit/1e3ca61d45e37ef118aa0c107b420ef74458697e
- https://github.com/Linuxfabrik/lib/releases/tag/v4.2.0
- https://github.com/Linuxfabrik/monitoring-plugins/security/advisories/GHSA-r35r-fpx2-jgr4
- https://github.com/Linuxfabrik/monitoring-plugins/security/advisories/GHSA-r35r-fpx2-jgr4