diff --git a/src/libxrpl/protocol/STParsedJSON.cpp b/src/libxrpl/protocol/STParsedJSON.cpp
index 3fb2825581..b928f0dbd8 100644
--- a/src/libxrpl/protocol/STParsedJSON.cpp
+++ b/src/libxrpl/protocol/STParsedJSON.cpp
@@ -78,7 +78,8 @@ static inline Json::Value
 not_an_object(std::string const& object, std::string const& field)
 {
     auto const fieldName = make_name(object, field);
-    return RPC::make_error(rpcINVALID_PARAMS, "Field '" + fieldName + "' is not a JSON object.");
+    std::string const msg = "Field '" + fieldName + "' is not a JSON object.";
+    return RPC::make_error(rpcINVALID_PARAMS, msg);
 }
 
 static inline Json::Value
@@ -97,28 +98,32 @@ static inline Json::Value
 unknown_field(std::string const& object, std::string const& field)
 {
     auto const fieldName = make_name(object, field);
-    return RPC::make_error(rpcINVALID_PARAMS, "Field '" + fieldName + "' is unknown.");
+    std::string const msg = "Field '" + fieldName + "' is unknown.";
+    return RPC::make_error(rpcINVALID_PARAMS, msg);
 }
 
 static inline Json::Value
 out_of_range(std::string const& object, std::string const& field)
 {
     auto const fieldName = make_name(object, field);
-    return RPC::make_error(rpcINVALID_PARAMS, "Field '" + fieldName + "' is out of range.");
+    std::string const msg = "Field '" + fieldName + "' is out of range.";
+    return RPC::make_error(rpcINVALID_PARAMS, msg);
 }
 
 static inline Json::Value
 bad_type(std::string const& object, std::string const& field)
 {
     auto const fieldName = make_name(object, field);
-    return RPC::make_error(rpcINVALID_PARAMS, "Field '" + fieldName + "' has bad type.");
+    std::string const msg = "Field '" + fieldName + "' has bad type.";
+    return RPC::make_error(rpcINVALID_PARAMS, msg);
 }
 
 static inline Json::Value
 invalid_data(std::string const& object, std::string const& field)
 {
     auto const fieldName = make_name(object, field);
-    return RPC::make_error(rpcINVALID_PARAMS, "Field '" + fieldName + "' has invalid data.");
+    std::string const msg = "Field '" + fieldName + "' has invalid data.";
+    return RPC::make_error(rpcINVALID_PARAMS, msg);
 }
 
 static inline Json::Value
@@ -131,14 +136,16 @@ static inline Json::Value
 array_expected(std::string const& object, std::string const& field)
 {
     auto const fieldName = make_name(object, field);
-    return RPC::make_error(rpcINVALID_PARAMS, "Field '" + fieldName + "' must be a JSON array.");
+    std::string const msg = "Field '" + fieldName + "' must be a JSON array.";
+    return RPC::make_error(rpcINVALID_PARAMS, msg);
 }
 
 static inline Json::Value
 string_expected(std::string const& object, std::string const& field)
 {
     auto const fieldName = make_name(object, field);
-    return RPC::make_error(rpcINVALID_PARAMS, "Field '" + fieldName + "' must be a string.");
+    std::string const msg = "Field '" + fieldName + "' must be a string.";
+    return RPC::make_error(rpcINVALID_PARAMS, msg);
 }
 
 static inline Json::Value
diff --git a/src/xrpld/app/paths/detail/AMMLiquidity.cpp b/src/xrpld/app/paths/detail/AMMLiquidity.cpp
index ebbb51ce25..97c4ea7c47 100644
--- a/src/xrpld/app/paths/detail/AMMLiquidity.cpp
+++ b/src/xrpld/app/paths/detail/AMMLiquidity.cpp
@@ -179,7 +179,10 @@ AMMLiquidity<TIn, TOut>::getOffer(ReadView const& view, std::optional<Quality> c
         }
         catch (std::overflow_error const& e)
         {
-            JLOG(j_.error()) << "AMMLiquidity::getOffer overflow " << e.what();
+            // Store e.what() in a local variable to prevent stack-use-after-scope
+            // when the exception's internal storage becomes invalid in coroutine context
+            std::string const errorMsg = e.what();
+            JLOG(j_.error()) << "AMMLiquidity::getOffer overflow " << errorMsg;
             if (!view.rules().enabled(fixAMMOverflowOffer))
                 return maxOffer(balances, view.rules());
             else
@@ -187,7 +190,10 @@ AMMLiquidity<TIn, TOut>::getOffer(ReadView const& view, std::optional<Quality> c
         }
         catch (std::exception const& e)
         {
-            JLOG(j_.error()) << "AMMLiquidity::getOffer exception " << e.what();
+            // Store e.what() in a local variable to prevent stack-use-after-scope
+            // when the exception's internal storage becomes invalid in coroutine context
+            std::string const errorMsg = e.what();
+            JLOG(j_.error()) << "AMMLiquidity::getOffer exception " << errorMsg;
         }
         return std::nullopt;
     }();