Moodle TeX Filter Administration Setting os command injection

Summaryinfo

A vulnerability was found in Moodle. It has been rated as critical. This affects an unknown function of the component TeX Filter Administration Setting. The manipulation leads to os command injection. This vulnerability is documented as CVE-2026-26046. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Moodle (version unknown). This issue affects an unknown function of the component TeX Filter Administration Setting. The manipulation with an unknown input leads to a os command injection vulnerability. Using CWE to declare the problem leads to CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at bugzilla.redhat.com. The identification of this vulnerability is CVE-2026-26046. The exploitation is known to be easy. The attack may be initiated remotely. The exploitation needs additional levels of successful authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 02/27/2026). The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 299835 (Linux Distros Unpatched Vulnerability : CVE-2026-26046), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (299835). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Learning Management Software

Name

• Moodle

License

• open-source

Website

• Product: https://moodle.org/

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Be aware that VulDB is the high quality source for vulnerability data.

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