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CVE-2026-115574Zulip: Custom profile fields can be read by logged-out visitors in organization with web-public channels
Zulip is an open-source team collaboration tool. From 11.0 until 12.2, organizations with web-public channels enabled exposed the GET /json/users endpoint to logged-out spectators, and a missing access-control check allowed include_custom_profile_fields=true to return every user's custom profile field values in addition to the documented limited directory data. This exposed those custom profile field values to unauthenticated visitors. This issue is fixed in version 12.2.
5.3 MEDIUMEPSS 0.70%Not in KEVNVD: Awaiting Analysis
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 5.3 | MEDIUM | 3.1GitHub_M (CNA) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
Details
- CVE ID
- CVE-2026-115574
- Status
- Awaiting Analysis
- Assigner (CNA)
- GitHub_M
- Published
- Nov 4, 2026
- Last modified
- 2026-11-06 21:29 UTC
- Weaknesses
- CWE-862 · Missing Authorization
Affected Products
As published by the CNA in the CVE record.
zulipzulip1 version range
- >= 11.0, < 12.2
References
- github.com https://github.com/zulip/zulip/commit/6f33a8fa345ba776039a3f46131c253599a3ba15
- github.com https://github.com/zulip/zulip/commit/774d4c7b12755178fa406f0c0f3b2cafdbbec32c
- github.com https://github.com/zulip/zulip/pull/39913
- github.com https://github.com/zulip/zulip/releases/tag/12.2
- github.com https://github.com/zulip/zulip/security/advisories/GHSA-3m37-hwq6-jrj8
- zulip.readthedocs.io https://zulip.readthedocs.io/en/latest/overview/changelog.html#zulip-server-12-2