---
id: CVE-2026-90957
title: >-
  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
summary: >-
  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 …
severity: medium
cvss: 5.1
cvssVector: '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'
cwe:
  - CWE-79
  - CWE-693
vendor: MISP
product: MISP
affected:
  - MISP < 2.5.46
published: '2026-09-14'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T13:42:47.970'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90957'
references:
  - url: 'https://github.com/MISP/MISP/commit/86496aecc'
    label: 5a6e4751-2f3f-4070-9419-94fb35b644e8
tags:
  - nvd
  - cve.org
epss: 0.00396
epssPercentile: 0.31202
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-14T13:58:18.267352Z'
cvssSource: cna
ingestedAt: '2026-09-14T15:23:07.422Z'
---

## Overview

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

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.