🛡️ CVE-2026-40300
🟡 CVSS 6.5 — Medium ✅ No Known Exploit NVD
6.5
CVSS Score
0 Low4 Medium7 High9 Critical10

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Prior to 12.0, With message_edit_history_visibility_policy set to "moves", /api/v1/messages/{id}/history still returns historical content values, allowing low-privilege users to recover text that was edited away from other users' messages.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.

Details

Severity Medium
CVSS Score 6.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2026-05-12
Updated 2026-06-02
Modified N/A
Fix URL N/A

Affected Packages

Software From version Fixed in
unknown
zulip-server

References

N/A

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