CVE-2026-90957: Misp

Medium severity, CVSS 5.1. EPSS: 0.4% chance of exploitation in the next 30 days.

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

Affected products

• Misp Misp: before 2.5.46 (fixed in 2.5.46)

Published 2026-09-14. Last modified 2026-09-16.