Medium severity6.5NVD Advisory· Published May 12, 2026· Updated May 13, 2026
CVE-2026-40300
CVE-2026-40300
Description
Zulip is an open-source team collaboration tool. Prior to 12.0, With message_edit_history_visibility_policy set to "moves", /api/v1/messages/{id}/history still returns historical content values, allowing low-privilege users to recover text that was edited away from other users' messages.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 vulnerability is fixed in 12.0.
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Affected products
2- cpe:2.3:a:zulip:zulip_server:10.0:*:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
1- github.com/zulip/zulip/security/advisories/GHSA-jp8f-mvv6-89crnvdExploitVendor Advisory
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