diff --git a/dashboard/src/stores/__tests__/auth.test.ts b/dashboard/src/stores/__tests__/auth.test.ts
index 1ca4674e..27a03b7b 100644
--- a/dashboard/src/stores/__tests__/auth.test.ts
+++ b/dashboard/src/stores/__tests__/auth.test.ts
@@ -262,15 +262,45 @@ describe("useAuthStore", () => {
         },
       },
     },
+    {
+      title: "invalid roles mapping",
+      stubEnv: {
+        VITE_OIDC_ABAC_ROLES_MAPPING: '{"admin": ["*"}',
+      },
+      error:
+        "Error parsing OIDC ABAC roles mapping: SyntaxError: Expected ',' or ']' after array element in JSON at position 14 (line 1 column 15)",
+    },
+    {
+      title: "not array roles mapping",
+      stubEnv: {
+        VITE_OIDC_ABAC_ROLES_MAPPING: '{"admin": ["*"], "other": "not array"}',
+      },
+      error:
+        "Error parsing OIDC ABAC roles mapping: unexpected JSON format, each role key must be an array of string attributes",
+    },
+    {
+      title: "not strings roles mapping",
+      stubEnv: {
+        VITE_OIDC_ABAC_ROLES_MAPPING: '{"admin": ["string", 1]}',
+      },
+      error:
+        "Error parsing OIDC ABAC roles mapping: unexpected JSON format, each role key must be an array of string attributes",
+    },
   ])("loads the configuration from the environment ($title)", (test) => {
     if (test.stubEnv) {
       Object.entries(test.stubEnv).forEach(([key, value]) =>
         vi.stubEnv(key, value),
       );
     }
+
     const authStore = useAuthStore();
-    authStore.loadConfig();
-    expect(authStore.config).toEqual(test.expected);
+    if (test.error) {
+      assert.throws(authStore.loadConfig, test.error);
+    } else {
+      authStore.loadConfig();
+      expect(authStore.config).toEqual(test.expected);
+    }
+
     vi.unstubAllEnvs();
   });
 
diff --git a/dashboard/src/stores/auth.ts b/dashboard/src/stores/auth.ts
index cd469c6e..d2fc6152 100644
--- a/dashboard/src/stores/auth.ts
+++ b/dashboard/src/stores/auth.ts
@@ -22,6 +22,17 @@ type ABACConfig = {
   rolesMapping: Record<string, string[]>;
 };
 
+function isRolesMapping(obj: any): obj is Record<string, string[]> {
+  for (const key in obj) {
+    if (
+      !Array.isArray(obj[key]) ||
+      !obj[key].every((item) => typeof item === "string")
+    )
+      return false;
+  }
+  return true;
+}
+
 export const useAuthStore = defineStore("auth", {
   state: () => ({
     config: {} as OIDCConfig,
@@ -142,11 +153,15 @@ export const useAuthStore = defineStore("auth", {
       }
       if (this.config.abac.useRoles && env.VITE_OIDC_ABAC_ROLES_MAPPING) {
         try {
-          this.config.abac.rolesMapping = JSON.parse(
-            env.VITE_OIDC_ABAC_ROLES_MAPPING.trim(),
-          );
+          const map = JSON.parse(env.VITE_OIDC_ABAC_ROLES_MAPPING.trim());
+          if (!isRolesMapping(map)) {
+            throw new Error(
+              "Error parsing OIDC ABAC roles mapping: unexpected JSON format, each role key must be an array of string attributes",
+            );
+          }
+          this.config.abac.rolesMapping = map;
         } catch (err) {
-          throw new Error(`Error parsing roles mapping: ${err}`);
+          throw new Error(`Error parsing OIDC ABAC roles mapping: ${err}`);
         }
       }
     },