diff --git a/packages/transaction/lib/chain.ts b/packages/transaction/lib/chain.ts
index a73f334536cbf25fd8fef225cec8c902e52e7c91..a3f23bcac1944a6277105378086bdf8730fced3b 100644
--- a/packages/transaction/lib/chain.ts
+++ b/packages/transaction/lib/chain.ts
@@ -1,10 +1,19 @@
 import type { ExtendedNodeApi, ExtendedRestApi } from './extended-hive.chain';
 import { hiveChainService } from './hive-chain-service';
 import { TWaxExtended, TWaxRestExtended } from '@hiveio/wax';
+import pLimit from 'p-limit';
 
 let chain: TWaxExtended<ExtendedNodeApi, TWaxRestExtended<ExtendedRestApi>> | undefined = undefined;
 
+// Serialize access to wax chain instance to prevent WASM memory corruption
+// from concurrent calls. WASM modules are not thread-safe, and concurrent
+// access (e.g., from Next.js Server Components) can cause "memory access
+// out of bounds" errors.
+const wasmLock = pLimit(1);
+
 export async function getChain() {
-  if (!chain) chain = await hiveChainService.getHiveChain();
-  return chain;
+  return wasmLock(async () => {
+    if (!chain) chain = await hiveChainService.getHiveChain();
+    return chain;
+  });
 }
diff --git a/packages/transaction/package.json b/packages/transaction/package.json
index 276cb330304f501293f028c2b733f9192bc4542b..ab260318336e03c7fa6fb8de9b9f2931e50198e3 100644
--- a/packages/transaction/package.json
+++ b/packages/transaction/package.json
@@ -10,6 +10,7 @@
     "@hive/smart-signer": "workspace:*",
     "@hiveio/wax": "catalog:hiveio-toolset",
     "@hiveio/workerbee": "catalog:hiveio-toolset",
+    "p-limit": "^3.1.0",
     "secure-random": "^1.1.2",
     "set-interval-async": "^3.0.3",
     "speakingurl": "^14.0.1"
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index ca2e6787dde68cc56ec9d60cd2efa0be23207d02..8ff15f77062f93397bace5a2991eb311c3cba733 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -789,6 +789,9 @@ importers:
       '@hiveio/workerbee':
         specifier: catalog:hiveio-toolset
         version: 1.28.4-rc0
+      p-limit:
+        specifier: ^3.1.0
+        version: 3.1.0
       secure-random:
         specifier: ^1.1.2
         version: 1.1.2