CVE-2026-53759 linuxfabrik-lib: Insecure creation of SQLite databases
Local attackers can exploit predictable SQLite paths in /tmp to overwrite files or corrupt databases via symlink attacks in the linuxfabrik-lib monitoring plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-53759?
CVE-2026-53759 is a low-severity path traversal vulnerability in Linuxfabrik monitoring-plugins, published on 18 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-377
Which versions are affected by CVE-2026-53759?
3 open source packages ship an affected version, including linuxfabrik-lib.
| Package | Affected | Fixed in |
|---|---|---|
linuxfabrik-lib PyPI | All versions | 4.2.0 |
linuxfabrik-lib PyPI | All versions | 4.2.0 |
linuxfabrik-lib PyPI | All versions | 4.2.0 |
How do I fix CVE-2026-53759?
Upgrade linuxfabrik-lib to 4.2.0 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-53759 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-53759 exists.
Sources
Also known as GHSA-r35r-fpx2-jgr4, PYSEC-2026-2596.