diff --git a/packages/frontend/editor-ui/src/plugins/codemirror/completions/datatype.completions.ts b/packages/frontend/editor-ui/src/plugins/codemirror/completions/datatype.completions.ts
index 7543562163b..d9e289c0056 100644
--- a/packages/frontend/editor-ui/src/plugins/codemirror/completions/datatype.completions.ts
+++ b/packages/frontend/editor-ui/src/plugins/codemirror/completions/datatype.completions.ts
@@ -1151,8 +1151,9 @@ export const secretOptions = (base: string) => {
 		if (typeof resolved !== 'object') {
 			return [];
 		}
-		return Object.entries(resolved).map(([secret, value]) =>
-			createCompletionOption({
+		return Object.entries(resolved).map(([secret, value]) => {
+			const needsBracketAccess = /\//.test(secret);
+			const option = createCompletionOption({
 				name: secret,
 				doc: {
 					name: secret,
@@ -1160,8 +1161,15 @@ export const secretOptions = (base: string) => {
 					description: i18n.baseText('codeNodeEditor.completer.$secrets.provider.varName'),
 					docURL: i18n.baseText('settings.externalSecrets.docs'),
 				},
-			}),
-		);
+			});
+
+			// Override the apply handler for keys that need bracket access
+			if (needsBracketAccess) {
+				option.apply = applyBracketAccessCompletion;
+			}
+
+			return option;
+		});
 	} catch {
 		return [];
 	}
diff --git a/packages/frontend/editor-ui/src/plugins/codemirror/completions/utils.test.ts b/packages/frontend/editor-ui/src/plugins/codemirror/completions/utils.test.ts
index 0434130e71a..983ed6f0d7b 100644
--- a/packages/frontend/editor-ui/src/plugins/codemirror/completions/utils.test.ts
+++ b/packages/frontend/editor-ui/src/plugins/codemirror/completions/utils.test.ts
@@ -6,7 +6,12 @@ import { EditorState } from '@codemirror/state';
 import { EditorView } from '@codemirror/view';
 import { NodeConnectionTypes, type IConnections } from 'n8n-workflow';
 import type { MockInstance } from 'vitest';
-import { autocompletableNodeNames, expressionWithFirstItem, stripExcessParens } from './utils';
+import {
+	autocompletableNodeNames,
+	expressionWithFirstItem,
+	stripExcessParens,
+	isAllowedInDotNotation,
+} from './utils';
 import { useWorkflowsStore } from '@/stores/workflows.store';
 import { mockedStore } from '@/__tests__/utils';
 import { createTestingPinia } from '@pinia/testing';
@@ -183,4 +188,35 @@ describe('completion utils', () => {
 			expect(view.state.doc.toString()).toEqual(expected);
 		});
 	});
+
+	describe('isAllowedInDotNotation', () => {
+		it('should return false for keys with forward slashes', () => {
+			expect(
+				isAllowedInDotNotation(
+					'applications/n8n/available-to-users/google-cloud-geocoding-api-key',
+				),
+			).toBe(false);
+			expect(isAllowedInDotNotation('path/to/secret')).toBe(false);
+			expect(isAllowedInDotNotation('secret/with/slashes')).toBe(false);
+		});
+
+		it('should return false for keys with other special characters', () => {
+			expect(isAllowedInDotNotation('key with spaces')).toBe(false);
+			expect(isAllowedInDotNotation('key-with-hyphens')).toBe(false);
+			expect(isAllowedInDotNotation('key.with.dots')).toBe(false);
+			expect(isAllowedInDotNotation('key[with]brackets')).toBe(false);
+		});
+
+		it('should return true for valid JavaScript identifiers', () => {
+			expect(isAllowedInDotNotation('validKey')).toBe(true);
+			expect(isAllowedInDotNotation('valid_key')).toBe(true);
+			expect(isAllowedInDotNotation('validKey123')).toBe(true);
+			expect(isAllowedInDotNotation('_validKey')).toBe(true);
+		});
+
+		it('should return false for keys starting with numbers', () => {
+			expect(isAllowedInDotNotation('123key')).toBe(false);
+			expect(isAllowedInDotNotation('0invalid')).toBe(false);
+		});
+	});
 });
diff --git a/packages/frontend/editor-ui/src/plugins/codemirror/completions/utils.ts b/packages/frontend/editor-ui/src/plugins/codemirror/completions/utils.ts
index 35c1c86a64e..43e7194714d 100644
--- a/packages/frontend/editor-ui/src/plugins/codemirror/completions/utils.ts
+++ b/packages/frontend/editor-ui/src/plugins/codemirror/completions/utils.ts
@@ -136,7 +136,7 @@ export const isPseudoParam = (candidate: string) => {
  * Whether a string may be used as a key in object dot access notation.
  */
 export const isAllowedInDotNotation = (str: string) => {
-	const DOT_NOTATION_BANNED_CHARS = /^(\d)|[\\ `!@#$%^&*()+\-=[\]{};':"\\|,.<>?~]/g;
+	const DOT_NOTATION_BANNED_CHARS = /^(\d)|[\\ `!@#$%^&*()+\-=[\]{};':"\\|,.<>?~\/]/g;
 
 	return !DOT_NOTATION_BANNED_CHARS.test(str);
 };