Open-source security update alert: Kibana just shipped fixes for a high-risk vulnerability that could let attackers tamper with log output. The issue is tracked as CVE-2026-49091, rated CVSS 8.0, and it falls under “log injection” behavior. In many real deployments, Kibana works alongside Elasticsearch for log search, monitoring, observability, and security investigations. If your Kibana version is affected, a malicious actor may be able to craft input that gets written into logs, potentially impacting their authenticity and integrity. For teams that rely on logs for alerting, forensics, and incident timelines, this is particularly dangerous: tampered logs can hide attacker tracks or even send your investigation down the wrong path. Elastic attributes the root cause to improper output handling / missing neutralization (CWE-117). Fixed versions: upgrade to 7.17.15 (for 7.x) and 8.11.1 (for 8.x). Elastic Cloud Serverless is already patched, but Self-Managed users must upgrade manually. #Kibana #Elasticsearch #CyberSecurity #VulnerabilityManagement #IncidentResponse #LogIntegrity
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