CVE-2026-49096: CWE-248 Uncaught Exception in Elastic Kibana
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.
AI Analysis
Technical Summary
This vulnerability in Elastic Kibana arises from improper handling of malformed link syntax stored in case comments. When such a comment is formatted for display, an unhandled exception occurs, causing the affected case to be inaccessible. The flaw requires an authenticated user with privileges to comment on cases to exploit. The vulnerability is tracked as CWE-248 (Uncaught Exception) and involves denial of service via input data manipulation (CAPEC-153).
Potential Impact
The impact is a denial of service condition where a case in Kibana becomes inaccessible to all users who attempt to open it after a maliciously crafted comment is stored. There is no confidentiality or integrity impact reported. The vulnerability requires authenticated user privileges to comment on cases.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict commenting privileges to trusted users and monitor for malformed comments that could trigger this issue. Removal of the offending comment restores access to the case.
CVE-2026-49096: CWE-248 Uncaught Exception in Elastic Kibana
Description
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.
CVSS v3.1
Score 4.3medium
Affected software
pkg:github/elastic/kibanaRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Elastic Kibana arises from improper handling of malformed link syntax stored in case comments. When such a comment is formatted for display, an unhandled exception occurs, causing the affected case to be inaccessible. The flaw requires an authenticated user with privileges to comment on cases to exploit. The vulnerability is tracked as CWE-248 (Uncaught Exception) and involves denial of service via input data manipulation (CAPEC-153).
Potential Impact
The impact is a denial of service condition where a case in Kibana becomes inaccessible to all users who attempt to open it after a maliciously crafted comment is stored. There is no confidentiality or integrity impact reported. The vulnerability requires authenticated user privileges to comment on cases.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict commenting privileges to trusted users and monitor for malformed comments that could trigger this issue. Removal of the offending comment restores access to the case.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- elastic
- Date Reserved
- 2026-05-27T11:31:33.583Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a7e1a7fbf8831d539b180da
Added to database: 08/13/2026, 19:26:55 UTC
Last enriched: 08/13/2026, 20:13:02 UTC
Last updated: 08/13/2026, 23:01:06 UTC
Views: 3
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