CVE-2026-113611GHSA-33jq-x32c-3ccw
Outline before 1.8.0 Information Disclosure via Orphaned Webhook Subscriptions
outline outline
CVSS
6.9MediumExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 23 Oct 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.37%Chance of exploitation activity in the next 30 days, higher than 29% of CVEs. Scored 23 Oct 2026FIRST EPSS
What fixes it
- 1.8.0outlineCVE List
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
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.
Text from CVE List
Affected versions 1
- outlineaffected: all versions before 1.8.0CVE List
References 5
- github.com/outline/outline/commit/e044014cea958962fc9f5e2b8f6ff1d8cadd676fFixvia CVE List
- github.com/outline/outline/releases/tag/v1.8.0Fixvia CVE List
- vulncheck.com/advisories/outline-before-1.8.0-information-disclosure-via-orphaned-webhook-subscriptionsAdvisoryvia CVE List
- github.com/outline/outline/security/advisories/GHSA-33jq-x32c-3ccwExploitvia CVE List
- github.com/outline/outline/blob/v1.7.1/server/queues/processors/UserDeletedProcessor.tsReferencevia CVE List