CVE-2026-40300

Zulip is an open-source team collaboration tool. Prior to 12.0, With messageedithistoryvisibilitypolicy set to "moves", /api/v1/messages/id/history still returns historical content values, allowing low-privilege users to recover text that was edited away from other users' messages. This...

CVE-2026-40300 Zulip: Message edit history visible in "moves only" policy through /api/v1/messages/{id}/history

Zulip is an open-source team collaboration tool. Prior to 12.0, With messageedithistoryvisibilitypolicy set to "moves", /api/v1/messages/id/history still returns historical content values, allowing low-privilege users to recover text that was edited away from other users' messages. This...