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TI-2026-73826 Aliases CVE-2026-105106GHSA-8cv9-2m24-2x49

OS command injection in Koha Task Scheduler deletion via jobid

Priority HIGH 73CWE-78Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-78.

Summary

Koha before 24.11.20, from 25.05.00 before 25.05.15, from 25.11.00 before 25.11.09, and from 26.05.00 before 26.05.04 are affected. The tools/scheduler.pl handler passes the jobid parameter into an atrm shell command without validation, which allows injected shell commands (CWE-78). An authenticated staff user with the schedule_tasks permission can run arbitrary operating system commands as the Koha application user.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0188 79th percentileScored 2026-11-07
Fix Fixed Koha (Koha Community): 24.11.20, 25.05.15, 25.11.09 +1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Koha CommunityKohabefore 24.11.00; 24.11.00 to before 24.11.20; 25.05.00 to before 25.05.15; 25.11.00 to before 25.11.09; 26.05.00 to before 26.05.0424.11.20, 25.05.15, 25.11.09, 26.05.04Patch availableCNA
  • Koha VendorKoha Community Affected before 24.11.00; 24.11.00 to before 24.11.20; 25.05.00 to before 25.05.15; 25.11.00 to before 25.11.09; 26.05.00 to before 26.05.04 Fixed in 24.11.20, 25.05.15, 25.11.09, 26.05.04 Patch available CNA

Remediation

Upgrade Koha to 24.11.20, 25.05.15, 25.11.09, or 26.05.04. The issue is also fixed in the 26.11 development branch.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA Koha (Koha Community) Fixed in 24.11.20, 25.05.15, 25.11.09, 26.05.04

Timeline

  1. 2026-10-14 Threatist record created from CVE-2026-105106
  2. 2026-10-14 Alias added: GHSA-8cv9-2m24-2x49
  3. 2026-10-15 CISA SSVC decision points changed
  4. 2026-10-15 Priority changed: MEDIUM → HIGH

References

Other 4

  • TI-2026-24397 Authenticated SQL Injection in Koha displayby parameter of suggestion.pl CVSS 4.0HIGH 8.7
  • TI-2023-24038 SQL Injection vulnerability in Koha Library Software 23.0.5.04 and before allows a remote… CVSS 3.1HIGH 7.5
  • TI-2023-24039 File Upload vulnerability in Koha Library Software 23.05.04 and before allows a remote… CVSS 3.1MEDIUM 5.3
  • TI-2026-05641 Koha SQL Injection in reports/catalogue_out.pl via Filter URL Parameter CVSS 4.0MEDIUM 5.6
  • TI-2026-49955 Koha SQL Injection via order_by and {order}_ovalue Parameters in guided_reports.pl CVSS 3.1HIGH 8.8
  • TI-2026-49176 Koha - SQL Injection in reports/issues_stats.pl CVSS 3.1HIGH 8.8
See all 16 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences