Medium severity · published Sep 30, 2026
CVE-2026-102580
Moodle: arbitrary class instantiation via report builder audience classname
4.3
CVSS
0.2%
EPSS
No
On KEV
Description
A flaw was found in Moodle. An authenticated attacker can supply an improperly validated audience class name to the Report Builder component, allowing arbitrary class instantiation. This vulnerability enables the unauthorized creation of internal program objects, which may result in unexpected application behavior.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 15% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MO
Moodle · Moodle
before 4.5.13; 5.0.0 before 5.0.9; 5.1.0 before 5.1.6; 5.2.0 before 5.2.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-102580
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-102580
git.moodle.org
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-89078
vdb-entry
https://access.redhat.com/security/cve/CVE-2026-102580
issue-tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2543635
moodle.org
https://moodle.org/mod/forum/discuss.php?d=482498
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