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CVE-2026-115474— Zulip: Saving a draft DM to a user bypasses can_access_all_users_group permission

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 是一款开源团队协作工具。在版本 8.0 至 12.2 期间，若组织在“谁可以查看组织内其他用户”设置中限制了访客查看其他用户，则在保存或编辑直接消息草稿时，系统未验证发送者是否有权访问草稿的接收者。因此，访客无需实际发送消息，即可获取原本受限制用户的个人资料信息。未限制访客访问权限的组织不受此问题影响。该问题已在版本 12.2 中修复。

CVSS 6.5 · Medium

Possible ATT&CK Techniques 1 AI

T1592 · Gather Victim Host Information

Affected Version Matrix 1

VendorProduct Version RangeStatus
zulip zulip >= 8.0, < 12.2 affected
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I. Basic Information for CVE-2026-115474

Vulnerability Information
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Vulnerability Title
Zulip: Saving a draft DM to a user bypasses can_access_all_users_group permission
Source: CVE Program / CVE List V5
Vulnerability Description
Zulip is an open-source team collaboration tool. From 8.0 until 12.2, in organizations where the Who can view all other users in the organization setting restricted guests from viewing other users, saving or editing a direct message draft did not verify that the sender could access the draft recipients. A guest could thereby gain access to otherwise restricted users' profile information without sending a message. Organizations that did not restrict guest access were unaffected. This issue is fixed in version 12.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/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 >= 8.0, < 12.2 -

II. Public POCs for CVE-2026-115474

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III. Intelligence Information for CVE-2026-115474

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Patches & Fixes for CVE-2026-115474 (1)

Other References for CVE-2026-115474 (1)

Other References for CVE-2026-115474 (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-2026-115574 5.3 MEDIUM Zulip: Custom profile fields can be read by logged-out visitors in organization with web-p

IV. Related Vulnerabilities

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