diff --git a/.changeset/nine-coins-pull.md b/.changeset/nine-coins-pull.md
new file mode 100644
index 0000000000..ca5a724906
--- /dev/null
+++ b/.changeset/nine-coins-pull.md
@@ -0,0 +1,5 @@
+---
+'@directus/sdk': patch
+---
+
+Fixed logout SDK auth composable to include auth mode in request
diff --git a/sdk/src/auth/composable.ts b/sdk/src/auth/composable.ts
index 1bc0b0beb7..c1045e6b08 100644
--- a/sdk/src/auth/composable.ts
+++ b/sdk/src/auth/composable.ts
@@ -88,7 +88,7 @@ export const authentication = (mode: AuthenticationMode = 'cookie', config: Part
 					fetchOptions.credentials = authConfig.credentials;
 				}
 
-				const body: Record<string, any> = { mode };
+				const body: Record<string, string> = { mode };
 
 				if (mode === 'json' && authData?.refresh_token) {
 					body['refresh_token'] = authData.refresh_token;
@@ -154,12 +154,14 @@ export const authentication = (mode: AuthenticationMode = 'cookie', config: Part
 					fetchOptions.credentials = authConfig.credentials;
 				}
 
+				const body: Record<string, string> = { mode };
+
 				if (mode === 'json' && authData?.refresh_token) {
-					fetchOptions.body = JSON.stringify({
-						refresh_token: authData.refresh_token,
-					});
+					body['refresh_token'] = authData.refresh_token;
 				}
 
+				fetchOptions.body = JSON.stringify(body);
+
 				const requestUrl = getRequestUrl(client.url, '/auth/logout');
 				await request(requestUrl.toString(), fetchOptions, client.globals.fetch);