MISP DOM-based Cross-Site Scripting via innerHTML in Contextual Menu
MISP contains a DOM-based cross-site scripting (XSS) vulnerability in the contextual menu JavaScript component. The ContextualMenu class populates HTML elements by assigning user-controllable values to the innerHTML property. Because innerHTML parses and renders HTML markup, any untrusted string supplied as the option text (value.text or value) is interpreted as live DOM content rather than plain text. An attacker who can influence the data rendered in the contextual menu can inject arbitrary HTML or JavaScript that executes in the victim's browser within the MISP application origin. This may allow session hijacking, data exfiltration, or unauthorized actions performed on behalf of the authenticated user. Version affected: <2.5.47
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-94373
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 02:13 UTC · Revision 1
Source evidence
MISP DOM-based Cross-Site Scripting via innerHTML in Contextual Menu
core-osv · Original sourcePublished 21 Sept 2026, 12:16 UTC
MISP contains a DOM-based cross-site scripting (XSS) vulnerability in the contextual menu JavaScript component. The ContextualMenu class populates HTML elements by assigning user-controllable values to the innerHTML property. Because innerHTML parses and renders HTML markup, any untrusted string supplied as the option text (value.text or value) is interpreted as live DOM content rather than plain text. An attacker who can influence the data rendered in the contextual menu can inject arbitrary HTML or JavaScript that executes in the victim's browser within the MISP application origin. This may allow session hijacking, data exfiltration, or unauthorized actions performed on behalf of the authenticated user. Version affected: <2.5.47
osv:CVE-2026-94373
Complete source record
{
"id": "11657a8e9594d92418ed1c06a90f4fe0be9dc6b0b8f628b5d1321a68b1533f47",
"url": "https://osv.dev/vulnerability/CVE-2026-94373",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "MISP DOM-based Cross-Site Scripting via innerHTML in Contextual Menu",
"summary": "MISP contains a DOM-based cross-site scripting (XSS) vulnerability in the contextual menu JavaScript component. The ContextualMenu class populates HTML elements by assigning user-controllable values to the innerHTML property. Because innerHTML parses and renders HTML markup, any untrusted string supplied as the option text (value.text or value) is interpreted as live DOM content rather than plain text. An attacker who can influence the data rendered in the contextual menu can inject arbitrary HTML or JavaScript that executes in the victim's browser within the MISP application origin. This may allow session hijacking, data exfiltration, or unauthorized actions performed on behalf of the authenticated user. Version affected: <2.5.47",
"evidence": "osv:CVE-2026-94373",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-94373",
"aliases": [
"CVE-2026-94373"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/misp/misp",
"type": "GIT",
"events": [
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{
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{
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"database_specific": {
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{
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"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
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{
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"source": "REFERENCES_COMMIT"
}
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}
}
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-94373.json"
}
}
],
"modified": "2026-10-28T02:30:32.636312072Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/94xxx/CVE-2026-94373.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-94373",
"https://github.com/MISP/MISP/commit/b062698f2",
"https://github.com/MISP/MISP"
],
"provider_metadata": {
"cwe_ids": [
"CWE-79"
],
"cna_assigner": "CIRCL",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/94xxx/CVE-2026-94373.json"
}
},
"related_cves": [
{
"value": "CVE-2026-94373",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 499577,
"published_at": "2026-09-21T12:16:47.877+00:00"
}