Nextcloud is an open source content collaboration platform. From versions 5.5.13 to before 5.5.17, and 6.2.0 to before 6.2.3, an authenticated user can enumerate users on the same Nextcloud instance by using the Calendar app's endpoint for suggesting attendees. The sharing restrictions, applied to other endpoints, were not effective here. This issue has been patched in versions 5.5.17 and 6.2.3.
Metrics
Affected Vendors & Products
References
History
Mon, 01 Jun 2026 21:30:00 +0000
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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Mon, 01 Jun 2026 19:00:00 +0000
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| Description | Nextcloud is an open source content collaboration platform. From versions 5.5.13 to before 5.5.17, and 6.2.0 to before 6.2.3, an authenticated user can enumerate users on the same Nextcloud instance by using the Calendar app's endpoint for suggesting attendees. The sharing restrictions, applied to other endpoints, were not effective here. This issue has been patched in versions 5.5.17 and 6.2.3. | |
| Title | Nextcloud: Calendar app leaked user identifiers via attendee suggestion endpoint | |
| Weaknesses | CWE-200 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-06-01T19:13:25.363Z
Reserved: 2026-05-11T20:14:43.200Z
Link: CVE-2026-45286
Updated: 2026-06-01T19:13:04.269Z
Status : Received
Published: 2026-06-01T19:16:50.957
Modified: 2026-06-01T19:16:50.957
Link: CVE-2026-45286
No data.
OpenCVE Enrichment
Updated: 2026-06-01T20:45:25Z