Affected 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 <img>, they can execute when the SVG is navigated to directly or embedded as a document. In that case, malicious <script> 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
CVSS
No CVSS.
References
| Link | Resource |
|---|---|
| https://github.com/MISP/MISP/commit/86496aecc |
Configurations
No configuration.
History
No history.
Information
Published : 2026-09-14 13:19
Updated : 2026-09-16 13:42
NVD link : CVE-2026-90957
Mitre link : CVE-2026-90957
CVE.ORG link : CVE-2026-90957
JSON object : View
Products Affected
No product.