Zulip CVEs & Vulnerabilities

1 CVEs affecting Zulip products, tracked from the National Vulnerability Database, with CVSS/EPSS scores and exploitation status.

1 CVEs→ All vendors

Most Affected Products

zulip server 1

CVE-2026-40300MEDIUM

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Prior to 12.0, With message_edit_history_visibility_policy set to "moves", /api/v1/messages/{id}/history still returns historical content values, allowing low-privilege users to recover text that was edited away from other users' messages.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

12 May 2026

6.5

CVSS

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