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TI-2026-21051 Aliases CVE-2026-26046GHSA-4g4j-v56v-2w79

Moodle: moodle: improper input sanitization in tex filter administration setting

Priority MEDIUM 49CWE-78Published · Updated

Key facts

Attack vector
Network
Privileges required
High
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

A vulnerability was found in a Moodle TeX filter administrative setting where insufficient sanitization of configuration input could allow command injection. On sites where the TeX filter is enabled and ImageMagick is installed, a maliciously crafted setting value entered by an administrator could result in unintended system command execution. While exploitation requires administrative privileges, successful compromise could affect the entire Moodle server.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.13829 96th percentileScored 2026-11-07
Fix Fixed moodle: 4.5.9, 5.0.5, 5.1.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
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
—moodlebefore 4.5.9; 5.0.0 to before 5.0.5; 5.1.0 to before 5.1.24.5.9, 5.0.5, 5.1.2Patch availableCNA
  • moodle Vendor— Affected before 4.5.9; 5.0.0 to before 5.0.5; 5.1.0 to before 5.1.2 Fixed in 4.5.9, 5.0.5, 5.1.2 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*before 4.5.9; 5.0.0 to before 5.0.5; 5.1.0 to before 5.1.2VulnerableMoodle
  • cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:* Versions before 4.5.9; 5.0.0 to before 5.0.5; 5.1.0 to before 5.1.2 Vulnerable ·Moodle

Remediation

  • Fix · CNA moodle Fixed in 4.5.9, 5.0.5, 5.1.2

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-26046
  2. 2026-10-03 Alias added: GHSA-4g4j-v56v-2w79
  3. 2026-10-19 Priority changed: LOW → MEDIUM
  4. 2026-10-25 EPSS moved to the 95th–99th percentile

References

Advisory 2

  • TI-2024-22468 moodle: unsafe direct use of $_SERVER['HTTP_REFERER'] in admin/tool/mfa/index.php CVSS 3.1CRITICAL 9.8
  • TI-2021-14741 In Moodle, an SQL injection risk was identified in the library fetching a user's recent courses. CVSS 3.1CRITICAL 9.8
  • TI-2024-29071 Moodle: remote code execution via calculated question types CVSS 3.1HIGH 8.1
  • TI-2016-06653 Moodle 3.1.2 allows remote attackers to obtain sensitive information via unspecified… CVSS 3.1HIGH 7.5
  • TI-2022-00259 SQL injection in moodle CVSS 3.1CRITICAL 9.8
  • TI-2022-16116 Path traversal in Moodle CVSS 3.1HIGH 7.5
See all 636 →

Sources

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