Quick answers
- Is CVE-2026-104900 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-104900 being exploited in the wild.
- How severe is CVE-2026-104900?
- 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-2026-104900?
- 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-2026-104900 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-104900?
- 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
A stored XSS vulnerability exists in the count field template of the index table rendering for remote event previews. The template properly escapes the link URL but fails to HTML-encode the field value before rendering it directly to the browser. An attacker with event modification privileges on a linked remote MISP server can craft an event identifier containing HTML or JavaScript markup, which executes in the victim's browser session when viewing the remote event preview index.
Affected products
- MISP Project MISP before 2.5.48
Timeline
- 2026-10-02: disclosed