Cross-Site Scripting Vulnerability in MISP by The MISP Project
CVE-2026-104907

4.8MEDIUM

Key Information:

Vendor

Misp

Status
Misp
Vendor
CVE Published:
2 October 2026

What is CVE-2026-104907?

MISP is affected by a Cross-Site Scripting (XSS) vulnerability that arises when remote linked MISP servers provide malicious tag identifiers. This vulnerability allows attackers to execute arbitrary JavaScript in the context of authenticated user sessions. When users interact with event previews containing these crafted tag IDs, they become vulnerable to various attacks, including session hijacking and unauthorized actions in their browser. The issue exists due to insufficient sanitization of tag identifiers used in JavaScript contexts. To protect against this, update to MISP version 2.5.48 or later.

Affected Version(s)

MISP 0 < 2.5.48

References

https://github.com/MISP/MISP/commit/70ad174dd
patch

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Jeroen Pinoy
iglocska
Claude Opus 5.5 (1M context)
.