CVE-2026-113611CWE-863broken-access-control

CVE-2026-113611

Medium · published October 20, 2026

CVSS v3.1
4.9
EPSS
0%
Percentile
29.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.9 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
6.9 · CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00366 · 29.3th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2026-10-20T20:17Z
References (6)
https://github.com/outline/outline/blob/v1.7.1/server/queues/processors/UserDeletedProcessor.ts · [email protected]https://github.com/outline/outline/commit/e044014cea958962fc9f5e2b8f6ff1d8cadd676f · [email protected]https://github.com/outline/outline/releases/tag/v1.8.0 · [email protected]https://github.com/outline/outline/security/advisories/GHSA-33jq-x32c-3ccw · [email protected]https://www.vulncheck.com/advisories/outline-before-1.8.0-information-disclosure-via-orphaned-webhook-subscriptions · [email protected]https://github.com/outline/outline/security/advisories/GHSA-33jq-x32c-3ccw · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 22 OCT 03:29Z
    EPSS moved — → 0%
    epss
  • 20 OCT 15:40Z
    Outline before 1.8.0 Information Disclosure via Orphaned Webhook Subscriptions
    cvelistv5
  • 20 OCT 15:40Z
    Outline before 1.8.0 Information Disclosure via Orphaned Webhook Subscriptions
    cvelistv5