Security firm Claroc says it tried 43,551 Grok app addresses; 37,571 were online and 35,578 (94.7%) opened for anyone with no sign-in, and in its account Grok Build proposed "Anyone with the link" at publish [1][2]. Claroc says 24 open apps were built by SpaceXSI and X staff and others held internal data from 30 identifiable organizations, including an ICU briefing for a single patient and a hospital group roster of more than 3,500 employees; Anquanke reports an estimated 650 to 800 apps held private data [1][2]. What to do now: Claroc advises that any Grok app holding internal data be set to "Invited users" or "Only you", that a stranger get an error page, and that apps nobody owns be unpublished [1].
Claroc: over 35,000 Grok Build apps open without sign-in, exposing patient data and internal company documents
1 min read
- Disclosed
- Nov 10, 2026
- Published
- Nov 13, 2026
- Last updated
- Nov 13, 2026
- CVSS basis
- Our assessment
- Attack vector
- Impact
- Data type
On this page
30-second summary
What happened
Who is affected
Organisations running: SpaceXSI Grok Build (grok.me published apps)
What to do nowOur advice
- Set any Grok app holding internal data to "Invited users" or "Only you" and confirm a stranger gets an error page .
Affected scope
| Affected scope | Versions | Fixed in | |
|---|---|---|---|
| SpaceXSI Grok Build (grok.me published apps) | unknown[1] | — | ✗ Unpatched |
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Timeline
Technical details
References
Research1
- [1]Claroc Research2026-11-10Accessed 2026-11-13Snapshot 2026-11-13 sha256 f60aa3df5652
“We tried 43,551 Grok app addresses. 37,571 were still online, and 35,578 of those (94.7%) opened for anyone, with no sign-in.”
Media1
- [2]
This site aggregates public information and is not security consulting advice. Test remediation steps before applying.