Is CVE-2026-104906 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-104906 being exploited in the wild.

How severe is CVE-2026-104906?

Informational severity, published 2 October 2026.

Which products and versions are affected?

MISP Project MISP before 2.5.48.

Is there a fix for CVE-2026-104906?

Yes: fixed in 2.5.48. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-104906 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-104906?

Check whether you run MISP Project MISP at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-104906: MISP cross-site scripting in TAXII object viewer

CVE-2026-104906 · Severity: info · Published 2026-10-02

MISP is an open-source threat intelligence platform that helps organizations share and analyze threat data. The TAXII object viewer component fails to properly escape JSON content when displaying remote threat objects, allowing an attacker who can inject malicious content into a TAXII feed to execute arbitrary JavaScript in the browser of any user who views that object. This could lead to theft of session tokens, API keys, or unauthorized actions within the MISP application.

Technologies: MISP Project MISP. Vendors: MISP Project.

Quick answers

Is CVE-2026-104906 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-104906 being exploited in the wild.
How severe is CVE-2026-104906?: Informational severity, published 2 October 2026.
Which products and versions are affected?: MISP Project MISP before 2.5.48.
Is there a fix for CVE-2026-104906?: Yes: fixed in 2.5.48. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-104906 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-104906?: Check whether you run MISP Project MISP at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 2.5.48

Technical details

The vulnerability is a stored/reflected XSS in the TAXII object viewer (genericElements/json.ctp) where JSON string properties are rendered unescaped directly into an HTML pre block. An attacker who controls or influences TAXII object content can inject arbitrary HTML/JavaScript that executes in the authenticated victim's browser context. The fix involves HTML-encoding the JSON output before rendering.

Affected products

MISP Project MISP before 2.5.48

Timeline

2026-10-02: disclosed
2026-10-02: patched: Fix applied in commit 1bed4ca

References

https://github.com/MISP/MISP/commit/1bed4ca0c

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