CVE-2026-44695
Description
Outline is a service that allows for collaborative documentation. Prior to 1.7.1, the Slack integration callback for GET /auth/slack.post accepts an unsigned, session-independent OAuth state value. A third party who can obtain a Slack OAuth code for the same Outline Slack client can make a logged-in Outline user complete the callback and link that user's Outline account to the attacker's Slack team_id and user_id. The linked Slack identity can then use the Slack /outline search command as the victim Outline user. This vulnerability is fixed in 1.7.1.
How to fix
- getoutline outline1.7.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| getoutline outline | v < 1.7.1 | 1.7.1 |
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