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CVE-2026-105106— Koha authenticated OS command injection in tools/scheduler.pl via the jobid parameter when deleting a scheduled task

Quick assessment

Affected
Koha Community Koha
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 subst

CVSS 8.8 · High EPSS 1.61% · P75

Affected Version Matrix 5

VendorProduct Version RangeStatus
Koha Community Koha < 24.11.00 affected
24.11.00< 24.11.20 affected
25.05.00< 25.05.15 affected
25.11.00< 25.11.09 affected
26.05.00< 26.05.04 affected
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I. Basic Information for CVE-2026-105106

Vulnerability Information

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Vulnerability Title
Koha authenticated OS command injection in tools/scheduler.pl via the jobid parameter when deleting a scheduled task
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Koha Community Koha 0 ~ 24.11.00 -

II. Public POCs for CVE-2026-105106

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III. Intelligence Information for CVE-2026-105106

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Other References for CVE-2026-105106 (4)

IV. Related Vulnerabilities

Same product: Koha
Same vendor: Koha Community
Same weakness: CWE-78

V. Comments for CVE-2026-105106

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