{"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"],"vendor":"Koha Community","product":"Koha","affected":["Koha < 24.11.00","Koha >= 24.11.00 < 24.11.20","Koha >= 25.05.00 < 25.05.15","Koha >= 25.11.00 < 25.11.09","Koha >= 26.05.00 < 26.05.04"],"published":"2026-10-14","updated":"2026-10-15","sourceUpdated":"2026-10-15T15:53:08.287","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"},{"url":"https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=42674","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"epss":0.0188,"epssPercentile":0.79337,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2026-10-14T17:55:56.921737Z"},"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":"midnight","depthScore":61,"depthScoreParts":{"impact":48.4,"likelihood":0.4,"exploitation":12,"ransomware":0},"changes":[{"seq":221780,"id":"CVE-2026-105106","ts":1792035643231,"field":"exploit_available","old":"false","new":"true"}]}