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.
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History
Mon, 11 May 2026 22:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Outline: Slack OAuth state can link a victim Outline account to an attacker Slack identity | |
| Weaknesses | CWE-352 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-05-11T21:11:25.679Z
Reserved: 2026-05-07T17:07:09.316Z
Link: CVE-2026-44695
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Status : Received
Published: 2026-05-11T22:22:14.347
Modified: 2026-05-11T22:22:14.347
Link: CVE-2026-44695
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OpenCVE Enrichment
Updated: 2026-05-11T23:45:03Z
Weaknesses