{"id":"CVE-2026-105106","title":"Koha is vulnerable to OS command injection in the Task Scheduler deletion path","summary":"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. Sch…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-78"],"published":"2026-10-14","updated":"2026-10-14","sourceUpdated":"2026-10-14T08:17:03.587","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-105106","references":[{"url":"https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=42674","label":"309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c"},{"url":"https://download.koha-community.org/","label":"309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c"},{"url":"https://www.cve.org/CVERecord?id=CVE-2024-28739","label":"309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c"},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-30076","label":"309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c"}],"tags":["nvd"],"ingestedAt":"2026-10-14T08:23:04.340Z","slug":"CVE-2026-105106","body":"## Overview\n\nKoha 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}