Authorization bypass through user-controlled key in Kibana - CVE-2026-49089
Published: July 2, 2026
Vulnerability identifier: #VU136676
CSH Severity: Low
CVSS v4: 2.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-49089
CWE-ID: CWE-639
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to modify unauthorized data.
The vulnerability exists due to authorization bypass through user-controlled key in AI Assistant conversation access controls when handling requests that reference conversation identifiers. A remote user can supply another user's AI Assistant conversation identifier to modify a conversation they do not own to modify unauthorized data.
Exploitation requires knowledge of a hard-to-guess conversation identifier and access to the AI Assistant feature.
Affected software
Kibana
How to mitigate CVE-2026-49089
Install security update from vendor's website.
Kibana - addressed in versions 8.16.3, 8.17.2