Uncaught Exception in Kibana Cases Leading to Denial of Service
Uncaught Exception (CWE-248) in Kibana Cases can lead to denial of service via Input Data Manipulation (CAPEC-153). Malformed link syntax stored in a case comment was not rejected or sanitized when the comment was later formatted for display, and the resulting unhandled error prevented the affected case from being displayed. An authenticated user holding privileges to comment on a case could store such a comment, after which that case became inaccessible to every user who opened it until the stored comment was removed.
Affected Versions:
- All versions from 8.0.0 up to and including 8.19.19
- All versions from 9.0.0 up to and including 9.3.4
- Versions 9.4.0 and 9.4.1
Affected Configurations:
All configurations are affected.
Solutions and Mitigations:
The issue is resolved in version 8.19.20, 9.3.5, 9.4.2.
For Users that Cannot Upgrade:
There are no workarounds for this vulnerability.
Indicators of Compromise (IOC)
No specific indicators of compromise have been identified for this vulnerability.
Elastic Cloud Serverless
Due to our continuous deployment and patching model, the vulnerability described in this security advisory was remediated in our Elastic Cloud Serverless offering before the public disclosure.
Severity: CVSSv3.1: Medium ( 4.3 ) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CVE ID: CVE-2026-49096
Problem Type: CWE-248 - Uncaught Exception
Impact: CAPEC-153 - Input Data Manipulation