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CVE-2026-45281 Nextcloud: Cross-Account Calendar Takeover via Unauthorized Group-Member-Set Update

🗓️ 01 Jun 2026 16:52:57Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 28 Views

Authenticated user can take over another's calendar via improper authorization in the Nextcloud calendar backend.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-45281
1 Jun 202616:52
attackerkb
Circl
CVE-2026-45281
3 Jun 202618:37
circl
CNNVD
Nextcloud Server 安全漏洞
1 Jun 202600:00
cnnvd
CVE
CVE-2026-45281
1 Jun 202616:52
cve
EUVD
EUVD-2026-33706
1 Jun 202616:52
euvd
Fedora
[SECURITY] Fedora 44 Update: nextcloud-33.0.5-1.fc44
17 Jun 202608:44
fedora
Fedora
[SECURITY] Fedora 43 Update: nextcloud-33.0.5-1.fc43
17 Jun 202608:26
fedora
Tenable Nessus
Fedora 44 : nextcloud (2026-86fab2703b)
17 Jun 202600:00
nessus
Tenable Nessus
Fedora 43 : nextcloud (2026-cb3feafe41)
17 Jun 202600:00
nessus
Nextcloud
Cross-Account Calendar Takeover via Unauthorized Group-Member-Set Update
12 May 202609:04
nextcloud
Rows per page
[
  {
    "vendor": "nextcloud",
    "product": "security-advisories",
    "versions": [
      {
        "version": ">= 32.0.0, < 32.0.9",
        "status": "affected"
      },
      {
        "version": ">= 33.0.0, < 33.0.3",
        "status": "affected"
      }
    ]
  }
]

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