CVE-2026-45275 | Nextcloud is an open source content collaboration platform. … | CVSS 6.5 MEDIUM

Description

Nextcloud is an open source content collaboration platform. Prior to version 2.7.2, a privilege escalation vulnerability exists in the Approval app that allows a user without sharing permissions to force the system to share a file with approvers. This results in an authorization bypass and privilege escalation, allowing unauthorized distribution of restricted files. This issue has been patched in version 2.7.2.

Metadata

CVE ID: CVE-2026-45275
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-05-11 18:41 UTC
Published: 2026-06-01 16:51 UTC
Last updated: 2026-06-01 19:31 UTC
Primary CWE: CWE-285
CWE-285: Improper Authorization
Vendor / Product: nextcloud / security-advisories
Sources: cve.org · NVD

Severity & Metrics

6.5 MEDIUM CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
nextcloud	security-advisories	—	< 2.7.2

Weakness (CWE)

CWE	Source	Description
CWE-285	cna	CWE-285: Improper Authorization

CVSS scores (1)

Score	Severity	Version	Source	Vector
6.5	MEDIUM	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References (3)

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-v8q8-w6c3-3gv9 https://github.com/nextcloud/security-advisories/security/advisories/GHSA-v8q8-w6c3-3gv9
https://github.com/nextcloud/approval/pull/392 https://github.com/nextcloud/approval/pull/392
https://hackerone.com/reports/3593780 https://hackerone.com/reports/3593780