CVE-2026-115574
Zulip: Custom profile fields can be read by logged-out visitors in organization with web-public channels
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-862 |
| Vendor | zulip |
| Product | zulip |
| Published | Nov 4, 2026 |
| Last Updated | Nov 4, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Affected Versions
zulip / zulip
>= 11.0, < 12.2
References
github.com: https://github.com/zulip/zulip/security/advisories/GHSA-3m37-hwq6-jrj8 github.com: https://github.com/zulip/zulip/pull/39913 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/releases/tag/12.2 zulip.readthedocs.io: https://zulip.readthedocs.io/en/latest/overview/changelog.html#zulip-server-12-2