CVE-2026-45275: CWE-285: Improper Authorization in nextcloud security-advisories
Nextcloud versions prior to 2.7.2 contain a privilege escalation vulnerability in the Approval app. This flaw allows users without sharing permissions to bypass authorization controls and force the system to share files with approvers. The vulnerability enables unauthorized distribution of restricted files. The issue has been addressed in Nextcloud version 2.7.2. The CVSS score is 6.5, indicating a medium severity level.
AI Analysis
Technical Summary
CVE-2026-45275 is an improper authorization vulnerability (CWE-285) in the Nextcloud Approval app before version 2.7.2. It permits a user lacking sharing permissions to escalate privileges by coercing the system into sharing files with approvers, effectively bypassing intended access controls. This results in unauthorized file distribution. The vulnerability has been patched in version 2.7.2. The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N) reflects network attack vector, low attack complexity, requires low privileges, no user interaction, unchanged scope, high confidentiality impact, and no integrity or availability impact.
Potential Impact
The vulnerability allows unauthorized users with limited privileges to bypass sharing restrictions and distribute restricted files without proper authorization. This compromises confidentiality of sensitive data but does not affect integrity or availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Upgrade Nextcloud to version 2.7.2 or later, where this vulnerability has been patched. Since this is a self-hosted product, administrators must apply the update to remediate the issue. Patch status is confirmed by the vendor advisory stating the fix is included in version 2.7.2.
CVE-2026-45275: CWE-285: Improper Authorization in nextcloud security-advisories
Description
Nextcloud versions prior to 2.7.2 contain a privilege escalation vulnerability in the Approval app. This flaw allows users without sharing permissions to bypass authorization controls and force the system to share files with approvers. The vulnerability enables unauthorized distribution of restricted files. The issue has been addressed in Nextcloud version 2.7.2. The CVSS score is 6.5, indicating a medium severity level.
CVSS v3.1
Score 6.5medium
Affected software
pkg:github/nextcloud/approvalRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-45275 is an improper authorization vulnerability (CWE-285) in the Nextcloud Approval app before version 2.7.2. It permits a user lacking sharing permissions to escalate privileges by coercing the system into sharing files with approvers, effectively bypassing intended access controls. This results in unauthorized file distribution. The vulnerability has been patched in version 2.7.2. The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N) reflects network attack vector, low attack complexity, requires low privileges, no user interaction, unchanged scope, high confidentiality impact, and no integrity or availability impact.
Potential Impact
The vulnerability allows unauthorized users with limited privileges to bypass sharing restrictions and distribute restricted files without proper authorization. This compromises confidentiality of sensitive data but does not affect integrity or availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Upgrade Nextcloud to version 2.7.2 or later, where this vulnerability has been patched. Since this is a self-hosted product, administrators must apply the update to remediate the issue. Patch status is confirmed by the vendor advisory stating the fix is included in version 2.7.2.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-11T18:41:13.157Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a1de306e29bf47b503a5501
Added to database: 06/01/2026, 19:52:38 UTC
Last enriched: 06/08/2026, 21:07:48 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 87
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.