# CVE-2026-90957

## Summary

- **CVE ID:** CVE-2026-90957
- **Severity:** MEDIUM
- **CVSS Score:** 5.1 (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
- **Published:** Sep 14, 2026
- **Last Modified:** Sep 14, 2026

## 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

## Affected Products

- MISP — MISP (0)

## References

- [CNA](https://github.com/MISP/MISP/commit/86496aecc)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.23%
- **EPSS Percentile:** 14.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._