CVE-2026-45281

Katalog CVE

CVSS 8.1 · High EPSS 0,50%

Kerentanan Authorization Bypass Through User-Controlled Key pada nextcloud server. Skor CVSS 3.1 8.1 (High) menurut github.com.

Deskripsi (NVD)

Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, with the knowledge of other users’ principal URL an attacker could possibly send a request to gain full access to their calendar. Therefore, the attacker must be an authenticated user. This is because of improper authorization controls in the backend of the calendar. If the attacker had access to the calendar, they would be able to view and modify it. It is recommended that the Nextcloud Server is upgraded to 33.0.3 or 32.0.9. It is recommended that the Nextcloud Enterprise Server is upgraded to 33.0.3, 32.0.9, 31.0.14.5, 30.0.17.9, 29.0.16.16, 28.0.14.17, 27.1.11.26, 26.0.13.26, 25.0.13.29, 24.0.12.34, 23.0.12.35, 22.2.10.39, or 21.0.9.23

Rincian

Terbit di NVD

1 Juni 2026

Terakhir diubah

22 Juli 2026

Status NVD

Analyzed

CVSS 3.1

8.1 (High), sumber github.com
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-639: Authorization Bypass Through User-Controlled Key

EPSS (30 hari)

0,50% peluang dieksploitasi; lebih tinggi dari 40,9% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hrrv-mp25-26vv mitigasi · advisory vendor
• https://github.com/nextcloud/server/pull/59962 issue tracking · patch
• https://hackerone.com/reports/3545964 permissions required