How severe is CVE-2026-26047?

CVE-2026-26047 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-26047 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-26047?

CVE-2026-26047 affects Moodle. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-26047?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-26047 have an EU (EUVD) identifier?

Yes. CVE-2026-26047 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7527.

When was CVE-2026-26047 published?

CVE-2026-26047 was published on 2026-02-21 and last updated on 2026-06-17.

CVE-2026-26047

CVE-2026-26047 is a medium-severity vulnerability in Moodle with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-770.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-7527
Weakness: CWE-770
Affected product: Moodle
Published: 2026-02-21
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-26047?: CVE-2026-26047 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-26047 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-26047?: CVE-2026-26047 affects Moodle. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-26047?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-26047 have an EU (EUVD) identifier?: Yes. CVE-2026-26047 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7527.
When was CVE-2026-26047 published?: CVE-2026-26047 was published on 2026-02-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*

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Threat intelligence

Threat-intel indicators referencing this CVE:

190.128.224.134 (ipv4-addr)
185.227.135.83 (ipv4-addr)
103.210.35.122 (ipv4-addr)
136.158.151.228 (ipv4-addr)
212.125.4.206 (ipv4-addr)
203.100.66.90 (ipv4-addr)