Quick answers
- Is CVE-2026-103662 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-103662 being exploited in the wild.
- How severe is CVE-2026-103662?
- Informational severity, published 1 October 2026.
- Which products and versions are affected?
- Misp before 2.5.48.
- Is there a fix for CVE-2026-103662?
- 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-2026-103662 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-103662?
- Check whether you run 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 legacy addTag and disableTag confirmation forms in MISP reflect the tag name parameter from the URL unescaped into the rendered HTML output, enabling reflected XSS. An attacker must induce an authenticated site administrator to click a malicious URL; no user interaction beyond navigation is required. A successful exploit allows arbitrary JavaScript execution in the administrator's browser context, enabling session hijacking, CSRF token theft, and privilege escalation within MISP.
Affected products
- MISP MISP before 2.5.48
Timeline
- 2026-10-01: disclosed