Vulnerability DatabaseCVE-2026-40300
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CVE-2026-40300
Published:May 12, 2026
Updated:June 07, 2026
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Prior to 12.0, With message_edit_history_visibility_policy set to "moves", /api/v1/messages/{id}/history still returns historical content values, allowing low-privilege users to recover text that was edited away from other users' messages.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.
Affected Packages
https://github.com/zulip/zulip.git (GITHUB):
Affected version(s) >=enterprise-1.1.5 <12.0
Fix Suggestion:
Update to version 12.0
Related Resources (1)
https://github.com/zulip/zulip/security/advisories/GHSA-jp8f-mvv6-89cr
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CVSS v4
Base Score:
6
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Improper Access Control
CWE-284
EPSS
Base Score:
0.03