CVE-2026-26046Network attack vector

Administrator command execution via unsanitized TeX setting

Published Feb 21, 2026 · Updated Feb 21, 2026

OS command injection in Moodle LMS before 4.5.9, 5.0.0 through 5.0.4, and 5.1.0 through 5.1.1 allows remote authenticated users to execute commands. The TeX filter administration setting passes insufficiently sanitized configuration input to an external utility such as ImageMagick, allowing shell metacharacters to alter the operating-system command. Exploitation requires a site administrator, the TeX notation filter to be enabled, and ImageMagick installed; injected commands run on the Moodle server.

CVSS severity7.2
High
EPSS probability11.89%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Moodle LMS before 4.5.9, 5.0.0 through 5.0.4, and 5.1.0 through 5.1.1 allows remote authenticated users to execute commands. The TeX filter administration setting passes insufficiently sanitized configuration input to an external utility such as ImageMagick, allowing shell metacharacters to alter the operating-system command. Exploitation requires a site administrator, the TeX notation filter to be enabled, and ImageMagick installed; injected commands run on the Moodle server.

The record

CVE
CVE-2026-26046
Published
Feb 21, 2026
Updated
Feb 21, 2026
Vendor
Moodle
Product
Moodle LMS
Classifications
CWE-78, T1059
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Feb 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <4.5.9
  2. Affected versionversion=5.0.0 <5.0.5
  3. Affected versionversion=5.1.0 <5.1.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Moodle · Moodle LMSversion=0 <4.5.9; version=5.0.0 <5.0.5; version=5.1.0 <5.1.2

Published CVSS scores

7.2Fedora ProjectCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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