# CVE-2026-115574: Zulip: Custom profile fields can be read by logged-out visitors in organization with web-public channels

Status: published. Published: 2026-11-04. Updated: 2026-11-04.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- zulip / zulip: >= 11.0, < 12.2 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 3.1: 5.3 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-862

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/zulip/zulip/security/advisories/GHSA-3m37-hwq6-jrj8 (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/zulip/zulip/pull/39913 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/zulip/zulip/commit/6f33a8fa345ba776039a3f46131c253599a3ba15 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/zulip/zulip/commit/774d4c7b12755178fa406f0c0f3b2cafdbbec32c (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/zulip/zulip/releases/tag/12.2 (CNA: GitHub_M; x_refsource_MISC)

- https://zulip.readthedocs.io/en/latest/overview/changelog.html#zulip-server-12-2 (CNA: GitHub_M; x_refsource_MISC)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-115574; retrieved 2026-11-04; source updated 2026-11-04

Revision: e5f51f68b7162db6250fba2cac696a09fc10ad840a9cf208de19ac757fc0689f

Canonical: https://y2.dev/cve/CVE-2026-115574

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