SEPTEMBER 15, 2026
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Case File

CVE-2026-90957

MEDIUM · CVSS 5.1 Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-14 · Last synced 2026-09-15

CyberRota Analysis

AI-Generated

MISP versions up to 2.5.45 are vulnerable due to the inline serving of uploaded SVG images without a restrictive browser sandbox, allowing for potential execution of malicious scripts when the SVG is directly accessed or embedded. This vulnerability poses a risk to users' sessions, particularly in contexts such as organization logos and event-report images. Organizations using affected versions should prioritize patching to mitigate the risk of session hijacking and other exploits.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-90957
Severity
MEDIUM
CVSS
5.1
EPSS
N/A
Java

Original NVD 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