🛡️ CVE-2026-25742
🟡 CVSS 5.3 — Medium ⚠️ Exploit Public CWE-862 NVD
5.3
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Zulip is an open-source team collaboration tool. Prior to version 11.6, Zulip is an open-source team collaboration tool. From version 1.4.0 to before version 11.6, even after spectator access (enable_spectator_access / WEB_PUBLIC_STREAMS_ENABLED) is disabled, attachments originating from web-public streams can still be retrieved anonymously. As a result, file contents remain accessible even after public access is intended to be disabled. Similarly, even after spectator access is disabled, the /users/me//topics endpoint remains reachable anonymously, allowing retrieval of topic history for web-public streams. This issue has been patched in version 11.6. This issue has been patched in version 11.6.

Details

Severity MEDIUM
CVSS Score 5.3
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CWE CWE-862
Public Exploit ⚠️ Yes
Source NVD
Published 2026-04-03
Updated 2026-06-02
Modified 2026-04-13

Affected Packages

Software From version Fixed in
zulip 1.4.0 11.6

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