diff --git a/CHANGELOG.md b/CHANGELOG.md
index 97cd81d170..821c133eb2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,18 @@
 # Changelog
 
+## 3.11.3 / 2026-04-27
+
+This release fixes mutiple security issues.
+
+We would like to thank the following people for the responsible disclosures:
+- Shadowbyte (4c1dr3aper) - Charlie Lewis for the Remote-Read snappy decode vulnerability.
+- Brett Gervasoni for the AzureAD OAuth `client_secret` vulnerability.
+- @iiihaiii and @Ngocnn97 for the Old UI XSS vulnerability. 
+
+- [SECURITY] AzureAD remote write: Fix OAuth `client_secret` being exposed in plaintext via `/-/config` endpoint. GHSA-wg65-39gg-5wfj / CVE-2026-42151 #18590
+- [SECURITY] Remote-read: Reject snappy-compressed requests whose declared decoded length exceeds the decode limit. GHSA-8rm2-7qqf-34qm / CVE-2026-42154 #18584
+- [SECURITY] UI: Fix stored XSS via unescaped `le` label values in old UI heatmap chart tick labels. GHSA-fw8g-cg8f-9j28 #18588
+
 ## 3.11.2 / 2026-04-13
 
 This release has a fix for a Stored XSS vulnerability that can be triggered via crafted metric names and label values in Prometheus web UI tooltips and metrics explorer. Thanks to Duc Anh Nguyen from TinyxLab for reporting it.
diff --git a/VERSION b/VERSION
index 1e33456831..d2c96c0ab8 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.11.2
+3.11.3
diff --git a/web/ui/mantine-ui/package.json b/web/ui/mantine-ui/package.json
index 6af3419aca..cae1dc41f0 100644
--- a/web/ui/mantine-ui/package.json
+++ b/web/ui/mantine-ui/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@prometheus-io/mantine-ui",
   "private": true,
-  "version": "0.311.2",
+  "version": "0.311.3",
   "type": "module",
   "scripts": {
     "start": "vite",
@@ -28,7 +28,7 @@
     "@microsoft/fetch-event-source": "^2.0.1",
     "@nexucis/fuzzy": "^0.5.1",
     "@nexucis/kvsearch": "^0.9.1",
-    "@prometheus-io/codemirror-promql": "0.311.2",
+    "@prometheus-io/codemirror-promql": "0.311.3",
     "@reduxjs/toolkit": "^2.11.2",
     "@tabler/icons-react": "^3.40.0",
     "@tanstack/react-query": "^5.95.2",
diff --git a/web/ui/module/codemirror-promql/package.json b/web/ui/module/codemirror-promql/package.json
index 8f12a5c31e..32b9e7fd2d 100644
--- a/web/ui/module/codemirror-promql/package.json
+++ b/web/ui/module/codemirror-promql/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@prometheus-io/codemirror-promql",
-  "version": "0.311.2",
+  "version": "0.311.3",
   "description": "a CodeMirror mode for the PromQL language",
   "types": "dist/esm/index.d.ts",
   "module": "dist/esm/index.js",
@@ -29,7 +29,7 @@
   },
   "homepage": "https://github.com/prometheus/prometheus/blob/main/web/ui/module/codemirror-promql/README.md",
   "dependencies": {
-    "@prometheus-io/lezer-promql": "0.311.2",
+    "@prometheus-io/lezer-promql": "0.311.3",
     "lru-cache": "^11.2.7"
   },
   "devDependencies": {
diff --git a/web/ui/module/lezer-promql/package.json b/web/ui/module/lezer-promql/package.json
index 23818f2bba..d3f93ff577 100644
--- a/web/ui/module/lezer-promql/package.json
+++ b/web/ui/module/lezer-promql/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@prometheus-io/lezer-promql",
-  "version": "0.311.2",
+  "version": "0.311.3",
   "description": "lezer-based PromQL grammar",
   "main": "dist/index.cjs",
   "type": "module",
diff --git a/web/ui/package-lock.json b/web/ui/package-lock.json
index d171bc249f..2746578217 100644
--- a/web/ui/package-lock.json
+++ b/web/ui/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "prometheus-io",
-  "version": "0.311.2",
+  "version": "0.311.3",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "prometheus-io",
-      "version": "0.311.2",
+      "version": "0.311.3",
       "workspaces": [
         "mantine-ui",
         "module/*"
@@ -24,7 +24,7 @@
     },
     "mantine-ui": {
       "name": "@prometheus-io/mantine-ui",
-      "version": "0.311.2",
+      "version": "0.311.3",
       "dependencies": {
         "@codemirror/autocomplete": "^6.20.1",
         "@codemirror/language": "^6.12.3",
@@ -42,7 +42,7 @@
         "@microsoft/fetch-event-source": "^2.0.1",
         "@nexucis/fuzzy": "^0.5.1",
         "@nexucis/kvsearch": "^0.9.1",
-        "@prometheus-io/codemirror-promql": "0.311.2",
+        "@prometheus-io/codemirror-promql": "0.311.3",
         "@reduxjs/toolkit": "^2.11.2",
         "@tabler/icons-react": "^3.40.0",
         "@tanstack/react-query": "^5.95.2",
@@ -172,10 +172,10 @@
     },
     "module/codemirror-promql": {
       "name": "@prometheus-io/codemirror-promql",
-      "version": "0.311.2",
+      "version": "0.311.3",
       "license": "Apache-2.0",
       "dependencies": {
-        "@prometheus-io/lezer-promql": "0.311.2",
+        "@prometheus-io/lezer-promql": "0.311.3",
         "lru-cache": "^11.2.7"
       },
       "devDependencies": {
@@ -205,7 +205,7 @@
     },
     "module/lezer-promql": {
       "name": "@prometheus-io/lezer-promql",
-      "version": "0.311.2",
+      "version": "0.311.3",
       "license": "Apache-2.0",
       "devDependencies": {
         "@lezer/generator": "^1.8.0",
diff --git a/web/ui/package.json b/web/ui/package.json
index cad35c9697..2dbe4cf049 100644
--- a/web/ui/package.json
+++ b/web/ui/package.json
@@ -1,7 +1,7 @@
 {
   "name": "prometheus-io",
   "description": "Monorepo for the Prometheus UI",
-  "version": "0.311.2",
+  "version": "0.311.3",
   "private": true,
   "scripts": {
     "build": "bash build_ui.sh --all",