What is CVE-2026-26047?

CVE-2026-26047 is a medium-severity vulnerability in Moodle, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2026-02-21.

How severe is CVE-2026-26047?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Resource exhaustion in Moodle

CVE-2026-26047

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.

Vulnerability class: DoS (Denial of Service)

EPSS: 0.004 (35.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Moodle

Weakness classification (CWE)

References

patrick@puiterwijk.org (x_refsource_REDHAT, Third Party Advisory, vdb-entry)
patrick@puiterwijk.org (x_refsource_REDHAT, issue-tracking, Third Party Advisory)

Frequently asked questions

What is CVE-2026-26047?: CVE-2026-26047 is a medium-severity vulnerability in Moodle, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2026-02-21.
How severe is CVE-2026-26047?: Medium severity. CVSS v3 base score is 6.5 out of 10.