CVE-2026-26047: Moodle TeX formula editor is vulnerable to DoS through lack of execution time limits

CVE-2026-26047 · Severity: low · CVSS 3.1 · Published 2026-02-21

Moodle TeX formula editor is vulnerable to DoS through lack of execution time limits

Technologies: moodle/moodle (Packagist). Vendors: Packagist.

Quick answers

Is CVE-2026-26047 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-26047 being exploited in the wild.
How severe is CVE-2026-26047?
Low severity, with a CVSS score of 3.1, published 21 February 2026.
Which products and versions are affected?
moodle/moodle (Packagist) ECOSYSTEM:introduced=5.1.0-beta,fixed=5.1.2.
Is there a fix for CVE-2026-26047?
Yes. moodle/moodle (Packagist): upgrade to 5.1.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2026-26047?
Check whether you run moodle/moodle (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • moodle/moodle (Packagist): upgrade to 5.1.2 or later
    composer require moodle/moodle:^5.1.2

Affected products

  • moodle/moodle (Packagist) ECOSYSTEM:introduced=5.1.0-beta,fixed=5.1.2

Identifiers

  • CVE-2026-26047
  • GHSA-cg8j-5cr2-568q

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