GHSA-5MP5-7F8H-R69Q
Vulnerability from github – Published: 2026-09-14 15:32 – Updated: 2026-09-14 15:32Affected versions of MISP serve uploaded SVG images inline without a restrictive browser sandbox.
The commit explains that SVG files are XML documents rather than passive bitmap images. While scripts inside SVG do not execute when the SVG is rendered through a normal , they can execute when the SVG is navigated to directly or embedded as a document. In that case, malicious elements, event handlers, or javascript: URLs execute on the MISP origin with the viewer’s session.
The affected use cases include:
- organisation SVG logos; - event-report SVG pictures.
Importantly, the vulnerable behavior is on the serve path, not merely the upload path: the patch notes that a malicious SVG uploaded while SVG support was enabled could remain dangerous even after uploads were later disabled.
Version affected: ≤2.5.45
{
"affected": [],
"aliases": [
"CVE-2026-90957"
],
"database_specific": {
"cwe_ids": [
"CWE-79"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-14T13:19:32Z",
"severity": "MODERATE"
},
"details": "Affected versions of MISP serve uploaded SVG images inline without a restrictive browser sandbox.\n\n\nThe commit explains that SVG files are XML documents rather than passive bitmap images. While scripts inside SVG do not execute when the SVG is rendered through a normal \u003cimg\u003e, they can execute when the SVG is navigated to directly or embedded as a document. In that case, malicious \u003cscript\u003e elements, event handlers, or javascript: URLs execute on the MISP origin with the viewer\u2019s session.\n\n\nThe affected use cases include:\n\n\n\n\u2003- organisation SVG logos;\n\u2003-\u00a0event-report SVG pictures.\n\n\n\n\n\n\nImportantly, the vulnerable behavior is on the serve path, not merely the upload path: the patch notes that a malicious SVG uploaded while SVG support was enabled could remain dangerous even after uploads were later disabled.\n\n\n\nVersion affected: \u22642.5.45",
"id": "GHSA-5mp5-7f8h-r69q",
"modified": "2026-09-14T15:32:45Z",
"published": "2026-09-14T15:32:45Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90957"
},
{
"type": "WEB",
"url": "https://github.com/MISP/MISP/commit/86496aecc"
}
],
"schema_version": "1.4.0",
"severity": [
{
"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
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