diff --git a/.changeset/hungry-pens-rule.md b/.changeset/hungry-pens-rule.md
new file mode 100644
index 00000000000..3255aacaf38
--- /dev/null
+++ b/.changeset/hungry-pens-rule.md
@@ -0,0 +1,5 @@
+---
+"@apollo/client": patch
+---
+
+Use a WeakCache as backend for `executeSelectionSet`, `executeSubSelectedArray` and `maybeBroadcastWatch`.
diff --git a/src/cache/inmemory/inMemoryCache.ts b/src/cache/inmemory/inMemoryCache.ts
index 7be5b921ab5..9c435f64c18 100644
--- a/src/cache/inmemory/inMemoryCache.ts
+++ b/src/cache/inmemory/inMemoryCache.ts
@@ -34,6 +34,7 @@ import { Policies } from "./policies.js";
 import { hasOwn, normalizeConfig, shouldCanonizeResults } from "./helpers.js";
 import type { OperationVariables } from "../../core/index.js";
 import { getInMemoryCacheMemoryInternals } from "../../utilities/caching/getMemoryInternals.js";
+import { WeakCache } from "@wry/caches";
 
 type BroadcastOptions = Pick<
   Cache.BatchOptions<InMemoryCache>,
@@ -131,6 +132,7 @@ export class InMemoryCache extends ApolloCache<NormalizedCacheObject> {
         return this.broadcastWatch(c, options);
       },
       {
+        cache: WeakCache,
         max:
           this.config.resultCacheMaxSize ||
           cacheSizes["inMemoryCache.maybeBroadcastWatch"] ||
diff --git a/src/cache/inmemory/readFromStore.ts b/src/cache/inmemory/readFromStore.ts
index d89876d85c9..e00836bb10d 100644
--- a/src/cache/inmemory/readFromStore.ts
+++ b/src/cache/inmemory/readFromStore.ts
@@ -4,6 +4,7 @@ import type { DocumentNode, FieldNode, SelectionSetNode } from "graphql";
 import { Kind } from "graphql";
 import type { OptimisticWrapperFunction } from "optimism";
 import { wrap } from "optimism";
+import { WeakCache } from "@wry/caches";
 
 import type {
   Reference,
@@ -195,6 +196,7 @@ export class StoreReader {
         return this.execSelectionSetImpl(options);
       },
       {
+        cache: WeakCache,
         max:
           this.config.resultCacheMaxSize ||
           cacheSizes["inMemoryCache.executeSelectionSet"] ||
@@ -224,6 +226,7 @@ export class StoreReader {
         return this.execSubSelectedArrayImpl(options);
       },
       {
+        cache: WeakCache,
         max:
           this.config.resultCacheMaxSize ||
           cacheSizes["inMemoryCache.executeSubSelectedArray"] ||