Patroni

Splunk Enterprise Discloses 46 Vulnerabilities Including Critical Patroni Authentication Flaw

Splunk has published three security advisories detailing a total of 46 vulnerabilities affecting Splunk Enterprise and related components. Three of the issues were rated critical, with CVE-2026-76268 receiving a CVSS v3.1 base score of 9.8. The flaw resides in the Patroni REST API used for PostgreSQL cluster management within search head clusters, allowing unauthenticated remote attackers to execute arbitrary operating system commands. Another high-severity issue, CVE-2026-76266, enables local privilege escalation to root on Linux systems during package updates. The remaining vulnerabilities cover product code, internally identified problems, and third-party packages. Organizations are urged to apply the available patches promptly.

Keycloak Cluster on Three VMs: Engineers Detail Embedded Infinispan Setup, HA Testing Failures, and Bug Fix

A team deployed Keycloak for 25,000–30,000 users across a country using three isolated VMs instead of Kubernetes. They chose Embedded Infinispan with JGroups over an external cluster to reduce failure points and maintain session replication. PostgreSQL with Patroni handled shared storage and JDBC_PING discovery. Testing revealed that full datacenter outages triggered split-brain conditions and 5xx errors that the built-in healthcheck could not resolve. The engineers wrote a Python watcher script to detect multiple coordinators in the JGROUPS_PING table and restart affected containers. They reported the recovery bug to the Keycloak project, which was confirmed and fixed in a later release. The production cluster now survives single-DC loss without session loss.

OTUS Publishes September Digest of Free Lessons on Linux Administration, PostgreSQL, CI/CD and Infrastructure Security

OTUS has released a new digest listing free September webinars aimed at infrastructure engineers, DevOps specialists and system administrators. The program covers practical topics including Linux server configuration, PostgreSQL 18 performance tuning, high-availability clusters with Patroni, CI/CD pipelines in GitLab, eBPF observability and infrastructure security practices. All sessions are delivered by practicing OTUS instructors who share real-world production experience. Separate tracks address RAID and LVM management, GPO policies, release management in 1C environments, Go profiling, mitmproxy traffic analysis and responsible use of AI tools for incident investigation and code review. The webinars run throughout September at 19:00 or 20:00 Moscow time and require only free registration. The digest also includes sessions on career growth from tech lead to CTO and effective responsibility distribution for team leads.