CVE-2026-104901
MISP ID Translator: Unescaped Remote Event ID Enables Cross-Site Scripting via Linked Server
02 Description
MISP ID Translator: Unescaped Remote Event ID Enables Cross-Site Scripting via Linked Server
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.31% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 24.4% of scored records. A rank, not a probability.
- NVD base score
- 5.1 (CVSS v4.0), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- NVD analysis status
- Deferred. NVD last modified this record on 2026-10-02.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-10-02 15:21Z26 DAYS AGO
- Last updated
- 2026-10-02 16:15Z26 DAYS AGO
- Reserved
- 2026-10-02
- Assigning CNA
- CIRCL
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 5.1)
- CNA CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
- Weaknesses
- CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base
- Data version
- 5.2
- Document digest
- 67562ff17d1550d68f974ecf3d3010a29c640a7c40cf93829220e3b6ed60acfd
05 Affected products
06 References
- github.comSecurity patchhttps://github.com/MISP/MISP/commit/bd5e80c84
07 Remediation
The vulnerability is remediated by enforcing integer typing on the remote event ID at the point where it enters the application data structure in the controller, and by applying HTML output encoding (the h() helper) to all user-visible fields (remote_id, server_id) in both the default and Overmind-themed ID Translator views. This ensures that even if a remote server returns non-numeric or markup-laden data, it cannot be interpreted as HTML by the browser.