CVE-2026-115574 json
Zulip: Custom profile fields can be read by logged-out visitors in organization with web-public channels
published 5d ago modified 3d ago also EUVD-2026-117033
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 53%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
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.
Patch / fix
- github.com/zulip/zulip@6f33a8f commit
- github.com/zulip/zulip@774d4c7 commit
- github.com/zulip/zulip#39913 pull request
- github.com/zulip/zulip/releases/tag/12.2 release
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 4d ago
Exploit prediction
0.71% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- Nuclei template Zulip Server 11.0 - 12.1 - Unauthenticated Custom Profile Field Disclosure nuclei detection template
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
Affected products
- zulip zulip
Classification
- Weakness
-
- CWE-862 Missing Authorization
References
- github.com /zulip/zulip/pull/39913
- github.com /zulip/zulip/commit/6f33a8fa345ba776039a3f46131c253599a3ba15
- github.com /zulip/zulip/commit/774d4c7b12755178fa406f0c0f3b2cafdbbec32c
- github.com /zulip/zulip/security/advisories/GHSA-3m37-hwq6-jrj8
- github.com /zulip/zulip/releases/tag/12.2
- zulip.readthedocs.io /en/latest/overview/changelog.html#zulip-server-12-2
Sources
- CVE List CVE-2026-115574
- NVD CVE-2026-115574
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.