CVE-2026-49091: Elastic Kibana

High severity, CVSS 8.0. EPSS: 0.3% chance of exploitation in the next 30 days.

Improper Output Neutralization for Logs (CWE-117) in Kibana can lead to log injection via Log Injection-Tampering-Forging (CAPEC-93). An attacker can supply specially crafted input that is written to log files without proper neutralization. When the log files are subsequently viewed in a terminal that interprets control sequences, the injected content may alter the displayed log data.

Affected products

• Elastic Kibana: from 7.0.0, before 7.17.15 (fixed in 7.17.15); from 8.0.0, before 8.11.1 (fixed in 8.11.1)

Published 2026-07-01. Last modified 2026-07-02.