Medium
Pimcore through 2026.3.1 Stored XSS via ExternalImage Field Version Preview
Type: advisorySources: OSV
Pimcore through 2026.3.1 contains a stored cross-site scripting vulnerability that allows authenticated backend users to inject scripts by storing unescaped URLs in ExternalImage fields. Attackers with data object edit permission can store attribute-breaking payloads that execute JavaScript in the admin origin when other users open version preview or diff views.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-109392
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 22:19 UTC · Revision 1
Source evidence
Pimcore through 2026.3.1 Stored XSS via ExternalImage Field Version Preview
core-osv · Original sourcePublished 12 Oct 2026, 15:16 UTC
Pimcore through 2026.3.1 contains a stored cross-site scripting vulnerability that allows authenticated backend users to inject scripts by storing unescaped URLs in ExternalImage fields. Attackers with data object edit permission can store attribute-breaking payloads that execute JavaScript in the admin origin when other users open version preview or diff views.
osv:CVE-2026-109392
Complete source record
{
"id": "7843d558569378afe608486a5b89a94df9a80bd416fc49f24be16451d39ea5c7",
"url": "https://osv.dev/vulnerability/CVE-2026-109392",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Pimcore through 2026.3.1 Stored XSS via ExternalImage Field Version Preview",
"summary": "Pimcore through 2026.3.1 contains a stored cross-site scripting vulnerability that allows authenticated backend users to inject scripts by storing unescaped URLs in ExternalImage fields. Attackers with data object edit permission can store attribute-breaking payloads that execute JavaScript in the admin origin when other users open version preview or diff views.",
"evidence": "osv:CVE-2026-109392",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-109392",
"aliases": [
"CVE-2026-109392"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/pimcore/pimcore",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"last_affected": "a7e728c2f61705d484590c9876c114c0b4899feb"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"last_affected": "2026.3.1"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"range": [
{
"introduced": "0"
},
{
"last_affected": "2026.3.1"
}
],
"source": "DESCRIPTION"
}
]
}
}
],
"versions": [
"v2026.3.1",
"v2026.3.0",
"v2026.2.1",
"v2026.2.0",
"v2026.1.0",
"v12.3.0",
"v12.2.1",
"v12.2.0",
"v12.1.0",
"v12.0.0",
"v12.0.0-RC2",
"v12.0.0-RC1",
"v11.5.0-RC2",
"v11.5.0-RC1",
"v11.4.0",
"v11.4.0-RC1",
"v11.3.0",
"v11.3.0-RC2",
"v11.3.0-RC1",
"v11.2.1",
"v11.2.0",
"v11.1.0-RC1",
"v11.0.0",
"v11.0.0-RC2",
"v11.0.0-RC1",
"v11.0.0-BETA1",
"v11.0.0-ALPHA8",
"v11.0.0-ALPHA7",
"v11.0.0-ALPHA6",
"v11.0.0-ALPHA5",
"v11.0.0-ALPHA4",
"v11.0.0-ALPHA3",
"v11.0.0-ALPHA2",
"v11.0.0-ALPHA1",
"v10.5.0",
"v10.4.0",
"v10.3.0",
"v10.2.1",
"v10.2.0",
"v10.1.0",
"v10.0.0",
"v10.0.0-BETA4",
"v10.0.0-BETA3",
"v10.0.0-BETA2",
"v10.0.0-BETA1",
"v6.8.0",
"v6.7.0",
"v6.6.4",
"v6.6.3",
"v6.6.2",
"v6.6.1",
"v6.6.0",
"v6.5.3",
"v6.5.2",
"v6.5.1",
"v6.5.0",
"v6.4.2",
"v6.4.1",
"v6.4.0",
"v6.3.6",
"v6.3.5",
"v6.3.4",
"v6.3.3",
"v6.3.2",
"v6.3.1",
"v6.3.0",
"v6.2.3",
"v6.2.2",
"v6.2.1",
"v6.2.0",
"v6.1.2",
"v6.1.1",
"v6.1.0",
"v6.0.5",
"v6.0.4",
"v6.0.3",
"v6.0.2",
"v6.0.1",
"v6.0.0",
"v5.8.3",
"v5.8.2",
"v5.8.1",
"v5.8.0",
"v5.7.3",
"v5.7.2",
"v5.7.1",
"v5.7.0",
"v5.6.3",
"v5.5.4",
"v5.5.2",
"v5.5.1",
"v5.5.0",
"v5.4.4",
"v5.4.3",
"v5.4.2",
"v5.4.1",
"v5.4.0",
"v5.3.1",
"v5.3.0",
"v5.2.3",
"v5.2.0",
"v5.1.3",
"v5.1.2",
"v5.1.1",
"v5.1.0",
"v5.1.0-alpha",
"v5.0.4",
"v5.0.3",
"v5.0.2",
"v5.0.1",
"v5.0.0",
"v5.0.0-RC",
"4.4.3",
"4.4.2",
"4.4.1",
"4.4.0",
"4.3.1",
"4.2.0",
"4.1.3",
"4.1.2",
"4.1.1",
"4.1.0",
"4.0.1",
"4.0.0",
"3.1.1",
"3.1.0",
"3.0.6",
"3.0.5",
"3.0.4",
"3.0.3",
"3.0.2",
"3.0.1",
"3.0.0",
"2.3.0",
"2.2.2",
"2.2.1",
"2.2.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-109392.json"
}
}
],
"modified": "2026-10-28T02:30:39.941752432Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109392.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-109392",
"https://www.vulncheck.com/advisories/pimcore-through-2026.3.1-stored-xss-via-externalimage-field-version-preview",
"https://github.com/pimcore/pimcore",
"https://github.com/pimcore/admin-ui-classic-bundle/blob/2.3/templates/admin/data_object/data_object/preview_version.html.twig#L198",
"https://github.com/pimcore/pimcore/blob/v2026.3.1/models/DataObject/ClassDefinition/Data/ExternalImage.php#L169-L203",
"https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/rJCbgCKjMe"
],
"provider_metadata": {
"cwe_ids": [
"CWE-79"
],
"cna_assigner": "VulnCheck",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109392.json"
}
},
"related_cves": [
{
"value": "CVE-2026-109392",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 507555,
"published_at": "2026-10-12T15:16:39.934+00:00"
}