diff --git a/packages/transaction-pay-controller/CHANGELOG.md b/packages/transaction-pay-controller/CHANGELOG.md
index 94cd461539..65735ab7d2 100644
--- a/packages/transaction-pay-controller/CHANGELOG.md
+++ b/packages/transaction-pay-controller/CHANGELOG.md
@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
+- Fix BigNumber crash when exchange rate numbers exceed 15 significant digits ([#8808](https://github.com/MetaMask/core/pull/8808))
 - Handle gas-station and prefunded gas-estimate edge cases for Across Predict withdraw quotes ([#8762](https://github.com/MetaMask/core/pull/8762))
 
 ## [22.5.0]
diff --git a/packages/transaction-pay-controller/src/utils/token.ts b/packages/transaction-pay-controller/src/utils/token.ts
index 493b268e1a..4534a048c9 100644
--- a/packages/transaction-pay-controller/src/utils/token.ts
+++ b/packages/transaction-pay-controller/src/utils/token.ts
@@ -212,12 +212,12 @@ export function getTokenFiatRate(
 
   const usdRate = isStablecoin
     ? '1'
-    : new BigNumber(tokenToNativeRate ?? 1)
-        .multipliedBy(nativeToUsdRate)
+    : new BigNumber(String(tokenToNativeRate ?? 1))
+        .multipliedBy(String(nativeToUsdRate))
         .toString(10);
 
-  const fiatRate = new BigNumber(tokenToNativeRate ?? 1)
-    .multipliedBy(nativeToFiatRate)
+  const fiatRate = new BigNumber(String(tokenToNativeRate ?? 1))
+    .multipliedBy(String(nativeToFiatRate))
     .toString(10);
 
   return { usdRate, fiatRate };