[Docs] 3.8.1 release

documentation/docs/release-notes/3.8.1.md

@@ -0,0 +1,60 @@
+# Percona Monitoring and Management 3.8.1
+
+**Release date**: June 10th, 2026
+
+Percona Monitoring and Management (PMM) is an open source database monitoring, management, and observability solution for MySQL, PostgreSQL, MongoDB, Valkey and Redis. PMM empowers you to:
+
+- monitor the health and performance of your database systems
+- identify patterns and trends in database behavior
+- diagnose and resolve issues faster with actionable insights
+- manage databases across on-premises, cloud, and hybrid environments
+
+## 📋 Release summary
+
+PMM 3.8.1 is a security-focused release that patches critical and high-severity vulnerabilities in gRPC, Grafana, and nginx, and fixes several ClickHouse and dashboard stability issues.
+
+## 🔒 Security updates
+
+### Dependency security updates
+
+Updated PMM Client and Server dependencies to address multiple security
+vulnerabilities, including a critical gRPC authorization bypass
+([CVE-2026-33186](https://nvd.nist.gov/vuln/detail/CVE-2026-33186)) and high severity fixes for Docker, Go JOSE, go-getter, and OpenTelemetry components.
+
+### Grafana upgraded to 12.4.3+security-02 to address CVEs
+
+PMM 3.8.1 upgrades Grafana to 12.4.3+security-02 to address 10 security vulnerabilities. We recommend upgrading to PMM 3.8.1 as soon as possible.
+For the full list of CVEs addressed through this upgrade, see the [Grafana 12.4.3+security-02 release notes](https://github.com/grafana/grafana/releases/tag/v12.4.3%2Bsecurity-02).
+
+
+### nginx upgraded to address [CVE-2026-1642](https://nvd.nist.gov/vuln/detail/CVE-2026-1642)
+
+PMM 3.8.1 upgrades the bundled nginx to fix a vulnerability that could
+allow an attacker to intercept and tamper with data passing through
+PMM Server.
+
+
+## ✅ Fixed issues
+
+- [PMM-15054](https://perconadev.atlassian.net/browse/PMM-15054): Fixed an issue where ClickHouse system log tables grew out of control, consuming all available memory and causing PMM Server to fail with
+`MEMORY_LIMIT_EXCEEDED` errors. PMM now disables the log tables it doesn't use and cleans up leftover tables from previous upgrades. 
+
+- [PMM-14858](https://perconadev.atlassian.net/browse/PMM-14858): Fixed an issue where PMM logged repeated connection errors when configured to use an external ClickHouse instance instead of the built-in one. 
+
+- [PMM-14763](https://perconadev.atlassian.net/browse/PMM-14763): Fixed an issue where OS metrics for AWS RDS instances continued to show data from the old primary after a blue-green switchover, instead of switching to the new primary.
+
+- [PMM-15075](https://perconadev.atlassian.net/browse/PMM-15075): Fixed an issue where the ClickHouse **Read Backoff** panel on the **PMM Health** dashboard displayed an error instead of the graph. Also standardized font sizes across all panels on the dashboard.
+
+- [PMM-15051](https://perconadev.atlassian.net/browse/PMM-15051): Fixed an issue where updating the public address in **Settings > Advanced Settings** returned a server error. 
+
+- [PMM-14894](https://perconadev.atlassian.net/browse/PMM-14894): Fixed the **Cluster Messages** graph in the **Valkey/Redis Cluster Details** dashboard to show the number of cluster messages per second instead of a cumulative total. The graph legend is also restored.
+
+- [PMM-15112](https://perconadev.atlassian.net/browse/PMM-15112): Fixed an issue where a leftover live reload script in Grafana caused an unexpected browser prompt for some users.
+
+- [PMM-14901](https://perconadev.atlassian.net/browse/PMM-14901): Fixed an issue in Real-Time Analytics (RTA) where the arrow navigation in the query details pane ignored active filters, moving through all queries instead of only the filtered ones.
+
+## 🚀 Ready to upgrade to PMM 3.8.1?
+
+- [New installation](../quickstart/quickstart.md)
+- [Upgrading from PMM 3](../pmm-upgrade/index.md)
+- [Upgrading from PMM 2](../pmm-upgrade/migrating_from_pmm_2.md)

documentation/docs/release-notes/index.md

@@ -1,4 +1,5 @@
 # Release notes
+- [Percona Monitoring and Management 3.8.1](3.8.1.md)
 - [Percona Monitoring and Management 3.7.1](3.7.1.md)
 - [Percona Monitoring and Management 3.7.0](3.7.0.md)
 - [Percona Monitoring and Management 3.6.0](3.6.0.md)

documentation/mkdocs-base.yml

@@ -474,6 +474,7 @@ nav:
       - troubleshoot/data_issues.md
   - Release notes:
       - Release notes index: release-notes/index.md
+      - "PMM 3.8.1 (2026-05-10)": release-notes/3.8.1.md
       - "PMM 3.7.1 (2026-04-30)": release-notes/3.7.1.md
       - "PMM 3.7.0 (2026-04-01)": release-notes/3.7.0.md
       - "PMM 3.6.0 (2026-02-05)": release-notes/3.6.0.md 

documentation/mkdocs-pdf.yml

@@ -9,7 +9,7 @@ plugins:
   with-pdf:
     output_path: "pdf/PerconaMonitoringAndManagement-3.7.1.pdf"
     cover_title: "Percona Monitoring and Management Documentation"
-    cover_subtitle: 3.7.1 (April 30, 2026)
+    cover_subtitle: 3.8.1 (June 10, 2026)
     author: "Percona Technical Documentation Team"
     cover_logo: docs/images/Percona_Logo_Color.png
     custom_template_path: resources/templates