CVE-2026-26047
Medium
Description
A denial-of-service vulnerability was identified in Moodle’s TeX formula editor. When rendering TeX content using mimetex, insufficient execution time limits could allow specially crafted formulas to consume excessive server resources. An authenticated user could abuse this behavior to degrade performance or cause service interruption.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Moodle
PublishedFeb 21, 2026
First seenFeb 21, 2026
Weakness typeCWE-400Uncontrolled resource consumption
How to fix
Update
- moodle moodle4.5.9, 5.0.5, 5.1.2 or later
- moodle/moodle5.1.2, 5.0.5, 4.5.9 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| moodle moodle | v < 4.5.9, 5.0.0 ≤ v < 5.0.5, 5.1.0 ≤ v < 5.1.2 | 4.5.9, 5.0.5, 5.1.2 |
| moodle/moodlePackagist | 5.1.0-beta ≤ v < 5.1.2, 5.0.0-beta ≤ v < 5.0.5, v < 4.5.9 | 5.1.2, 5.0.5, 4.5.9 |
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