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2 vulnerabilities by Trilium
CVE-2026-91021 (GCVE-0-2026-91021)
Vulnerability from nvd – Published: 2026-09-14 17:13 – Updated: 2026-09-14 19:41
VLAI
EPSS
VEX
Title
CVE-2026-91021
Summary
Trilium Notes, version v0.103.0 and earlier, contains a stored cross-site scripting (XSS) vulnerability in the share renderer for webView notes due to improper HTML escaping of user-controlled #webViewSrc values. This vulnerability allows attackers with note-authoring privileges to inject arbitrary JavaScript that executes for any user who opens the shared note, including administrators.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-14 19:41 UTC
CWE
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CWE-116 Improper Encoding or Escaping of Output
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Trilium | Trillium Notes |
Affected:
0 , ≤ v0.103.0
(custom)
|
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"title": "CISA ADP Vulnrichment"
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"references": [
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],
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},
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CVE-2026-91021 (GCVE-0-2026-91021)
Vulnerability from cvelistv5 – Published: 2026-09-14 17:13 – Updated: 2026-09-14 19:41
VLAI
EPSS
VEX
Title
CVE-2026-91021
Summary
Trilium Notes, version v0.103.0 and earlier, contains a stored cross-site scripting (XSS) vulnerability in the share renderer for webView notes due to improper HTML escaping of user-controlled #webViewSrc values. This vulnerability allows attackers with note-authoring privileges to inject arbitrary JavaScript that executes for any user who opens the shared note, including administrators.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-14 19:41 UTC
CWE
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CWE-116 Improper Encoding or Escaping of Output
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Trilium | Trillium Notes |
Affected:
0 , ≤ v0.103.0
(custom)
|
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"timestamp": "2026-09-14T19:41:10.009376Z",
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],
"providerMetadata": {
"dateUpdated": "2026-09-14T19:41:39.660Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Trillium Notes",
"vendor": "Trilium",
"versions": [
{
"lessThanOrEqual": "v0.103.0",
"status": "affected",
"version": "0",
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}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Trilium Notes, version v0.103.0 and earlier, contains a stored cross-site scripting (XSS) vulnerability in the share renderer for webView notes due to improper HTML escaping of user-controlled #webViewSrc values. This vulnerability allows attackers with note-authoring privileges to inject arbitrary JavaScript that executes for any user who opens the shared note, including administrators."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
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},
{
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{
"description": "CWE-116 Improper Encoding or Escaping of Output",
"lang": "en"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-14T17:13:51.770Z",
"orgId": "37e5125f-f79b-445b-8fad-9564f167944b",
"shortName": "certcc"
},
"references": [
{
"url": "https://vokecyber.com/research/trilium-share-renderer-stored-xss"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "CVE-2026-91021",
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"env": "prod",
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