CVE-2026-115574Medium· 5.3▾ TwilightPoC availableZulip 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_custo…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 29.2 · likelihood 0.1 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Public exploit / PoC code seen in 1 source. Availability, not in-the-wild use.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Nov 5.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.3%
0.3% → 0.7%
Nuclei ×1 (last check)
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.
zulip >= 11.0, < 12.2Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-115474Medium· 6.5Zulip: Saving a draft DM to a user bypasses can_access_all_users_group permission
CVE-2026-97701Medium· 6.5Zulip: Missing content-length limit on POST /messages/render allows denial-of-service via oversized requests
CVE-2026-100404Medium· 6.5Zulip is an open-source team collaboration tool
CVE-2026-102893Critical· 9.1Zulip is an open-source team collaboration tool
CVE-2026-25742Medium· 5.3Zulip is an open-source team collaboration tool
CVE-2026-26058Medium· 6.1Zulip is an open-source team collaboration tool