High
Moodle: moodle: improper validation in file restore functionality leading to remote code execution
Type: advisorySources: OSV
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-26045
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 2 Nov 2026, 19:45 UTC · Revision 1
Source evidence
Moodle: moodle: improper validation in file restore functionality leading to remote code execution
core-osv · Original sourcePublished 21 Feb 2026, 05:40 UTC
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.
osv:CVE-2026-26045
Complete source record
{
"id": "bfc51c2e8d365147822fcf0278a126f47be2156792467237eeb89707e6a708d4",
"url": "https://osv.dev/vulnerability/CVE-2026-26045",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Moodle: moodle: improper validation in file restore functionality leading to remote code execution",
"summary": "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.",
"evidence": "osv:CVE-2026-26045",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-26045",
"aliases": [
"BIT-moodle-2026-26045",
"CVE-2026-26045",
"GHSA-ggxq-2mg9-8966"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
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"repo": "https://github.com/moodle/moodle",
"type": "GIT",
"events": [
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},
{
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{
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{
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{
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{
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}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "4.5.9"
}
],
"source": "CPE_RANGE"
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{
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"range": [
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{
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{
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}
],
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-26045.json"
}
}
],
"modified": "2026-10-28T02:30:22.924920884Z",
"provider": "osv",
"references": [
"https://access.redhat.com/security/cve/CVE-2026-26045",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26045.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-26045",
"https://bugzilla.redhat.com/show_bug.cgi?id=2440901",
"https://github.com/moodle/moodle"
],
"provider_metadata": {
"cwe_ids": [
"CWE-94"
],
"cna_assigner": "fedora",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26045.json"
}
},
"related_cves": [
{
"value": "CVE-2026-26045",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 489314,
"published_at": "2026-02-21T05:40:05.763+00:00"
}