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

Quick assessment

Affected
zulip zulip
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Zulip 是一款开源的团队协作工具。在 11.0 到 12.2 版本期间，启用了“网络公开频道”（web-public channels）的组织会将 端点暴露给未登录的访客。由于缺少访问控制检查，当请求参数包含 时，该端点不仅会返回文档中说明的有限目录数据，还会返回所有用户的自定义个人资料字段值。这导致这些自定义字段值被未认证的访客获取。该问题已在 12.2 版本中修复。

CVSS 5.3 · Medium

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 1

VendorProduct Version RangeStatus
zulip zulip >= 11.0, < 12.2 affected
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I. Basic Information for CVE-2026-115574

Vulnerability Information
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Vulnerability Title
Zulip: Custom profile fields can be read by logged-out visitors in organization with web-public channels
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
zulip zulip >= 11.0, < 12.2 -

II. Public POCs for CVE-2026-115574

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III. Intelligence Information for CVE-2026-115574

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Patches & Fixes for CVE-2026-115574 (1)

Other References for CVE-2026-115574 (1)

Other References for CVE-2026-115574 (4)

Same Patch Batch · zulip · 2026-11-04 · 3 CVEs total

CVE-2026-97701 6.5 MEDIUM Zulip: Missing content-length limit on POST /messages/render allows denial-of-service via
CVE-2026-115474 6.5 MEDIUM Zulip: Saving a draft DM to a user bypasses can_access_all_users_group permission

IV. Related Vulnerabilities

Same product: zulip
Same vendor: zulip
Same weakness: CWE-862