CVE-2026-44695

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...

CVE-2026-44695 Outline: Slack OAuth state can link a victim Outline account to an attacker Slack identity

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...

PT-2026-39865

Name of the Vulnerable Software and Affected Versions Outline versions prior to 1.7.1 Description The Slack integration callback for the endpoint "/auth/slack.post" accepts an unsigned, session-independent OAuth state value. This allows a third party with a Slack OAuth code for the same Outline...