CVE-2026-25742

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/<stream_id>/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.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/zulip/zulip/commit/3c045414299680b9f5dca7d76cf6cef6121c0236	Patch
https://github.com/zulip/zulip/commit/41e23347b5218b3b0397a55176c7d97396735bae	Patch
https://github.com/zulip/zulip/releases/tag/11.6	Release Notes
https://github.com/zulip/zulip/security/advisories/GHSA-f47p-xjqq-g28w	Exploit Vendor Advisory
https://github.com/zulip/zulip/security/advisories/GHSA-f47p-xjqq-g28w	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:zulip:zulip:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-04-03 21:17

Updated : 2026-07-24 22:10

NVD link : CVE-2026-25742

Mitre link : CVE-2026-25742

CVE.ORG link : CVE-2026-25742

JSON object : View

Products Affected

zulip

zulip

CWE

CWE-862

Missing Authorization

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