Vulnerability · Published Oct 14, 2026 · Assigned by TuranSec
CVE-2026-105106Koha authenticated OS command injection in tools/scheduler.pl via the jobid parameter when deleting a scheduled task
High 8.8
In plain English
A high-severity OS command injection in Koha from Koha Community. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.9% (higher than 80% of all known vulnerabilities).
Official description
Koha is vulnerable to OS command injection in the Task Scheduler deletion path. The tools/scheduler.pl handler accepts the jobid request parameter for op=cud-delete and passes it to C4::Scheduler::remove_at_job without validating it. Schedule::At::remove substitutes the supplied job ID into an atrm command string without quoting or escaping it and executes the command through a single-argument system() call, which invokes the shell. An authenticated staff user with the tools => schedule_tasks permission can therefore execute arbitrary operating-system commands as the Koha web/application user by supplying shell metacharacters in jobid. The issue is fixed in Koha 24.11.20, 25.05.15, 25.11.09, and 26.05.04, and in the 26.11 development branch.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Koha Community | Koha | 0 – before 24.11.0024.11.00 – before 24.11.2025.05.00 – before 25.05.1525.11.00 – before 25.11.0926.05.00 – before 26.05.04 |
Weakness: CWE-78 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H