# CVE-2026-26046: Moodle: moodle: improper input sanitization in tex filter administration setting

> Administrators can execute arbitrary system commands via unsanitized TeX filter settings in Moodle when ImageMagick is installed.

- **Severity:** High 7.2 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 21 Feb 2026
- **Updated:** 26 Feb 2026
- **Also known as:** BIT-moodle-2026-26046, GHSA-4g4j-v56v-2w79, UBUNTU-CVE-2026-26046

## What is CVE-2026-26046?

CVE-2026-26046 is a high-severity command injection vulnerability in Moodle Moodle, published on 21 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

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.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2026-26046?

1 open source package ship an affected version, including moodle. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `moodle` | Bitnami | All versions | 4.5.9, 5.0.5, 5.1.2 |

Products: Moodle Moodle.

## How do I fix CVE-2026-26046?

Upgrade moodle to a fixed version for your release line: 4.5.9, 5.0.5 or 5.1.2.

## Is CVE-2026-26046 being exploited?

There is no known exploitation of CVE-2026-26046 in the wild and no public exploit code.

## Other vulnerabilities in Moodle Moodle

- [CVE-2006-4935](https://insights.sbomify.com/CVE-2006-4935/): File upload in n/a (critical 10.0)
- [CVE-2006-4936](https://insights.sbomify.com/CVE-2006-4936/): Moodle does not properly validate module instance id (critical 10.0)
- [CVE-2004-2233](https://insights.sbomify.com/CVE-2004-2233/): Unknown "front page vulnerability with Moodle servers" for Moodle before 1.3.2 has unknown impact and attack vectors. (critical 10.0)
- [CVE-2004-2235](https://insights.sbomify.com/CVE-2004-2235/): Cross-site scripting in n/a (critical 10.0)
- [CVE-2004-2236](https://insights.sbomify.com/CVE-2004-2236/): Other in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-26046 and fix it if it is affected.

What it is: CVE-2026-26046 is a high-severity command injection vulnerability in Moodle Moodle, published on 21 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-26046 in the wild and no public exploit code.

Affected packages and fixed versions:
- moodle (Bitnami): affected all versions; fixed in 4.5.9, 5.0.5, 5.1.2

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-26046/ (Markdown: https://insights.sbomify.com/CVE-2026-26046/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-26046
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-26046
- OSV: https://osv.dev/vulnerability/CVE-2026-26046

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-26046/
Summaries are generated and may contain mistakes; the official description above is the record.