How severe is CVE-2026-26045?

CVE-2026-26045 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-26045 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-26045?

CVE-2026-26045 affects Moodle. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-26045?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-26045 have an EU (EUVD) identifier?

Yes. CVE-2026-26045 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7390.

When was CVE-2026-26045 published?

CVE-2026-26045 was published on 2026-02-21 and last updated on 2026-06-17.

CVE-2026-26045

CVE-2026-26045 is a high-severity vulnerability in Moodle with a CVSS 3.x base score of 7.2. 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-94.

Key facts

Severity: High (CVSS 3.x base score 7.2)
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-7390
Weakness: CWE-94
Affected product: Moodle
Published: 2026-02-21
Last modified: 2026-06-17

Description

A flaw was identified in Moodle’s backup restore functionality where specially crafted backup files were not properly validated during processing. If a malicious backup file is restored, it could lead to unintended execution of server-side code. Since restore capabilities are typically available to privileged users, exploitation requires authenticated access. Successful exploitation could result in full compromise of the Moodle server.

Frequently asked questions

What is CVE-2026-26045?: A flaw was identified in Moodle’s backup restore functionality where specially crafted backup files were not properly validated during processing. If a malicious backup file is restored, it could lead to unintended execution of server-side code. Since restore capabilities are typically available to privileged users, exploitation requires authenticated access. Successful exploitation could result in full compromise of the Moodle server.
How severe is CVE-2026-26045?: CVE-2026-26045 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-26045 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-26045?: CVE-2026-26045 affects Moodle. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-26045?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-26045 have an EU (EUVD) identifier?: Yes. CVE-2026-26045 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7390.
When was CVE-2026-26045 published?: CVE-2026-26045 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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CVE-2004-2236 — Critical (CVSS 10.0): Unknown vulnerability in Moodle before 1.3.3 has unknown impact and attack vectors, related to language setting.
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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)