---
id: CVE-2026-113611
title: Outline before 1.8.0 Information Disclosure via Orphaned Webhook Subscriptions
summary: >-
  Outline before 1.8.0 contains an improper access revocation vulnerability that
  allows deleted administrators to keep receiving document contents because
  UserDeletedProcessor never disables their WebhookSubscription rows. Former
  admins wh…
severity: medium
cvss: 4.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-863
vendor: outline
product: outline
affected:
  - outline < 1.8.0
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-23T01:46:35.262721Z'
exploitAvailable: true
published: '2026-10-20'
updated: '2026-10-23'
sourceUpdated: '2026-10-23T01:46:58.619Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-113611'
references:
  - url: 'https://github.com/outline/outline/security/advisories/GHSA-33jq-x32c-3ccw'
    label: GitHub Security Advisory (GHSA-33jq-x32c-3ccw)
  - url: >-
      https://github.com/outline/outline/commit/e044014cea958962fc9f5e2b8f6ff1d8cadd676f
  - url: 'https://github.com/outline/outline/releases/tag/v1.8.0'
    label: outline v1.8.0 Release Notes
  - url: >-
      https://github.com/outline/outline/blob/v1.7.1/server/queues/processors/UserDeletedProcessor.ts
  - url: >-
      https://www.vulncheck.com/advisories/outline-before-1.8.0-information-disclosure-via-orphaned-webhook-subscriptions
    label: >-
      VulnCheck Advisory: Outline before 1.8.0 Information Disclosure via
      Orphaned Webhook Subscriptions
tags:
  - cve.org
  - exploit-available
epss: 0.00535
epssPercentile: 0.44913
ingestedAt: '2026-10-20T16:10:53.300Z'
---

## Overview

Outline before 1.8.0 contains an improper access revocation vulnerability that allows deleted administrators to keep receiving document contents because UserDeletedProcessor never disables their WebhookSubscription rows. Former admins who registered webhooks before deletion continue receiving full document bodies, including Markdown and Yjs data, via DeliverWebhookTask for every matching workspace event.

## Affected

- `outline < 1.8.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.