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. 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

6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

4.9CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

EPSS

0.5% chance of exploitation in the next 30 days; higher than 44% of CVEs (scores of 2026-10-25)

CWE

CWE-863

Published

2026-10-20

Modified

2026-10-23

Record from

the NVD, synced 2026-10-23

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

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