diff --git a/src/plugins/extractHeadings.ts b/src/plugins/extractHeadings.ts
index 6da1e5df8d7..526653f7a8f 100644
--- a/src/plugins/extractHeadings.ts
+++ b/src/plugins/extractHeadings.ts
@@ -31,6 +31,10 @@ export default function extractHeadings(doc: Node) {
 	}
 
 	doc.descendants((node, offset) => {
+		// Don't descent into details/blockquote nodes - their headings are hidden
+		if (node.type.name === 'details' || node.type.name === 'blockquote') {
+			return false
+		}
 		if (node.type.name !== 'heading') {
 			return
 		}
diff --git a/src/tests/plugins/extractHeadings.spec.js b/src/tests/plugins/extractHeadings.spec.js
index 5adaf5cbb74..75e67ce6f84 100644
--- a/src/tests/plugins/extractHeadings.spec.js
+++ b/src/tests/plugins/extractHeadings.spec.js
@@ -3,6 +3,8 @@
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
 
+import { Blockquote } from '@tiptap/extension-blockquote'
+import Details from '../../nodes/Details.js'
 import Heading from '../../nodes/Heading.js'
 import extractHeadings from '../../plugins/extractHeadings.ts'
 import createCustomEditor from '../testHelpers/createCustomEditor.ts'
@@ -35,6 +37,33 @@ describe('extractHeadings', () => {
 		expect(headings).toEqual([])
 	})
 
+	it('ignores headings inside a details block', () => {
+		const content = `
+			<h1>Visible heading</h1>
+			<details>
+				<summary>Details summary</summary>
+				<div data-type="detailsContent"><h1>Hidden heading</h1></div>
+			</details>
+		`
+		const doc = prepareDoc(content, [Details])
+		const headings = extractHeadings(doc)
+		expect(headings).toHaveLength(1)
+		expect(headings[0].text).toBe('Visible heading')
+	})
+
+	it('ignores headings inside a block quote block', () => {
+		const content = `
+			<h1>Visible heading</h1>
+			<blockquote>
+				<h1>Quoted heading</h1>
+			</blockquote>
+		`
+		const doc = prepareDoc(content, [Blockquote])
+		const headings = extractHeadings(doc)
+		expect(headings).toHaveLength(1)
+		expect(headings[0].text).toBe('Visible heading')
+	})
+
 	it('creates unique ids with a counter', () => {
 		const content = `
 			<h1>Level 1 heading</h1>
@@ -46,8 +75,8 @@ describe('extractHeadings', () => {
 	})
 })
 
-const prepareDoc = (content) => {
-	const editor = createCustomEditor(content, [Heading])
+const prepareDoc = (content, extraExtensions = []) => {
+	const editor = createCustomEditor(content, [Heading, ...extraExtensions])
 	const doc = editor.state.doc
 	editor.destroy()
 	return doc