Vulnerability Description
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
Related Weaknesses (CWE)
References
FAQ
What is CVE-2026-90957?
CVE-2026-90957 is a documented vulnerability. 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 script...
How severe is CVE-2026-90957?
CVSS scoring is not yet available for CVE-2026-90957. Check NVD for updates.
Is there a patch for CVE-2026-90957?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.