CVE-2026-113611
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.
Does this matter?
Lower severity and a low EPSS score (0.53%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 4.0
- 6.9 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.53% probability · 45th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-863
- Source
- disclosure@vulncheck.com
EPSS moved from 0.4% on 21 October 2026 to 0.5% on 26 October 2026.
References
- https://github.com/outline/outline/blob/v1.7.1/server/queues/processors/UserDeletedProcessor.ts
- https://github.com/outline/outline/commit/e044014cea958962fc9f5e2b8f6ff1d8cadd676f
- https://github.com/outline/outline/releases/tag/v1.8.0
- https://github.com/outline/outline/security/advisories/GHSA-33jq-x32c-3ccw
- https://www.vulncheck.com/advisories/outline-before-1.8.0-information-disclosure-via-orphaned-webhook-subscriptions
- https://github.com/outline/outline/security/advisories/GHSA-33jq-x32c-3ccw
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.