diff --git a/CHANGELOG.md b/CHANGELOG.md
index 99f2eb42d3b..5a30cea62ee 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -22,6 +22,7 @@ Docs: https://docs.openclaw.ai
 - Plugins/externalization: keep official ACPX, Google Chat, and LINE install specs on production package names, leaving beta-tag probing to the explicit OpenClaw beta update channel. Thanks @vincentkoc.
 - CLI/doctor: keep missing-plugin repair from overriding official catalog metadata with runtime fallbacks, so ACPX repairs preserve the official npm spec during the externalization rollout. Thanks @vincentkoc.
 - Plugins/catalog: preserve ClawHub install specs when generating the packaged channel catalog so future storepack-first channel plugins keep their remote source instead of becoming npm-only. Thanks @vincentkoc.
+- Plugins/catalog: pin bare npm specs from prerelease external channel catalog entries to the catalog entry version, so beta catalogs do not silently install the latest stable package.
 - Plugins/update: treat catalog-matched official npm updates and OpenClaw-authored externalized-bundled npm bridges as trusted official installs so launch-code plugins can update or migrate out of the bundled tree without scanner false positives. Thanks @vincentkoc.
 - Plugins/onboarding: fall back from ClawHub to npm only for missing package/version errors, keeping integrity and verification failures fail-closed during storepack rollout. Thanks @vincentkoc.
 - Control UI/Talk: fix Talk (OpenAI Realtime WebRTC) CORS failure by stripping server-side-only attribution headers (`originator`, `version`, `User-Agent`) from browser offer headers; `api.openai.com/v1/realtime/calls` only allows `authorization` and `content-type` in its CORS preflight, so forwarding these headers caused the browser SDP exchange to fail. Fixes #76435. Thanks @hclsys.
diff --git a/src/channels/plugins/catalog.ts b/src/channels/plugins/catalog.ts
index 4ff379345a6..c6d5d78b412 100644
--- a/src/channels/plugins/catalog.ts
+++ b/src/channels/plugins/catalog.ts
@@ -1,6 +1,7 @@
 import fs from "node:fs";
 import path from "node:path";
 import { MANIFEST_KEY } from "../../compat/legacy-names.js";
+import { isPrereleaseSemverVersion, parseRegistryNpmSpec } from "../../infra/npm-registry-spec.js";
 import { resolveOpenClawPackageRootSync } from "../../infra/openclaw-root.js";
 import { listChannelCatalogEntries } from "../../plugins/channel-catalog-registry.js";
 import {
@@ -240,12 +241,26 @@ function toChannelMeta(params: {
 function resolveInstallInfo(params: {
   install?: PluginPackageInstall;
   packageName?: string;
+  packageVersion?: string;
   packageDir?: string;
   workspaceDir?: string;
 }): ChannelPluginCatalogEntry["install"] | null {
   const clawhubSpec = normalizeOptionalString(params.install?.clawhubSpec);
-  const npmSpec =
+  let npmSpec =
     normalizeOptionalString(params.install?.npmSpec) ?? normalizeOptionalString(params.packageName);
+  const packageVersion = normalizeOptionalString(params.packageVersion);
+  const parsedNpmSpec = npmSpec ? parseRegistryNpmSpec(npmSpec) : null;
+  const expectedPackageName = normalizeOptionalString(params.packageName);
+  const parsedPackageName = expectedPackageName ? parseRegistryNpmSpec(expectedPackageName) : null;
+  if (
+    npmSpec &&
+    packageVersion &&
+    isPrereleaseSemverVersion(packageVersion) &&
+    parsedNpmSpec?.selectorKind === "none" &&
+    (!parsedPackageName || parsedNpmSpec.name === parsedPackageName.name)
+  ) {
+    npmSpec = `${parsedNpmSpec.name}@${packageVersion}`;
+  }
   if (!clawhubSpec && !npmSpec) {
     return null;
   }
@@ -296,6 +311,7 @@ function resolveInstallInfo(params: {
 function buildCatalogEntryFromManifest(params: {
   pluginId?: string;
   packageName?: string;
+  packageVersion?: string;
   packageDir?: string;
   origin?: PluginOrigin;
   trustedSourceLinkedOfficialInstall?: boolean;
@@ -317,6 +333,7 @@ function buildCatalogEntryFromManifest(params: {
   const install = resolveInstallInfo({
     install: params.install,
     packageName: params.packageName,
+    packageVersion: params.packageVersion,
     packageDir: params.packageDir,
     workspaceDir: params.workspaceDir,
   });
@@ -349,6 +366,7 @@ function buildExternalCatalogEntry(
   return buildCatalogEntryFromManifest({
     pluginId: manifest?.plugin?.id,
     packageName: entry.name,
+    packageVersion: entry.version,
     trustedSourceLinkedOfficialInstall: options?.trustedSourceLinkedOfficialInstall,
     channel: manifest?.channel,
     install: manifest?.install,
diff --git a/src/channels/plugins/contracts/test-helpers/channel-plugin-catalog-contract-suites.ts b/src/channels/plugins/contracts/test-helpers/channel-plugin-catalog-contract-suites.ts
index c60344f6fd3..00f18adaa3c 100644
--- a/src/channels/plugins/contracts/test-helpers/channel-plugin-catalog-contract-suites.ts
+++ b/src/channels/plugins/contracts/test-helpers/channel-plugin-catalog-contract-suites.ts
@@ -287,6 +287,40 @@ export function describeChannelPluginCatalogEntriesContract() {
           };
         },
       },
+      {
+        name: "pins bare external prerelease package specs to the entry version",
+        setup: () => {
+          const dir = fs.mkdtempSync(
+            path.join(resolvePreferredOpenClawTmpDir(), "openclaw-catalog-prerelease-"),
+          );
+          const catalogPath = path.join(dir, "catalog.json");
+          writeCatalogFile(catalogPath, {
+            ...createCatalogEntry({
+              packageName: "@openclaw/prerelease-demo-channel",
+              channelId: "prerelease-demo",
+              label: "Prerelease Demo",
+              blurb: "Prerelease package pinning fixture",
+            }),
+            version: "2026.5.3-beta.1",
+          });
+          return {
+            channelId: "prerelease-demo",
+            catalogPaths: [catalogPath],
+            expected: {
+              install: { npmSpec: "@openclaw/prerelease-demo-channel@2026.5.3-beta.1" },
+              installSource: {
+                npm: {
+                  spec: "@openclaw/prerelease-demo-channel@2026.5.3-beta.1",
+                  packageName: "@openclaw/prerelease-demo-channel",
+                  selector: "2026.5.3-beta.1",
+                  selectorKind: "exact-version",
+                  exactVersion: true,
+                },
+              },
+            },
+          };
+        },
+      },
       {
         name: "accepts external manifest entries with ClawHub-only install metadata",
         setup: () => {