CVE-2026-45154: CWE-284: Improper Access Control in nextcloud security-advisories
Nextcloud is an open source content collaboration platform. From version 2.6.0 to before version 4.3.0, when a previous collective pages was deleted and the collective was shared view-only, guests with access to the collective were able to access the deleted pages directly from the trashbin. This issue has been patched in version 4.3.0.
AI Analysis
Technical Summary
CVE-2026-45154 is an improper access control vulnerability (CWE-284) in Nextcloud's security-advisories product affecting versions 2.6.0 through before 4.3.0. When a collective page was deleted but shared as view-only, guests could still access the deleted pages from the trashbin, bypassing intended access restrictions. This issue was addressed and patched in Nextcloud version 4.3.0.
Potential Impact
The vulnerability allows unauthorized read access to deleted pages in the trashbin by guests with view-only access to a shared collective. The impact is limited to confidentiality (low data exposure) without affecting integrity or availability. There are no known active exploits in the wild.
Mitigation Recommendations
Upgrade Nextcloud to version 4.3.0 or later, where this vulnerability has been patched. Patch status is confirmed by the vendor advisory indicating the fix in version 4.3.0. No additional mitigation is required once updated.
CVE-2026-45154: CWE-284: Improper Access Control in nextcloud security-advisories
Description
Nextcloud is an open source content collaboration platform. From version 2.6.0 to before version 4.3.0, when a previous collective pages was deleted and the collective was shared view-only, guests with access to the collective were able to access the deleted pages directly from the trashbin. This issue has been patched in version 4.3.0.
CVSS v3.1
Score 2.6low
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-45154 is an improper access control vulnerability (CWE-284) in Nextcloud's security-advisories product affecting versions 2.6.0 through before 4.3.0. When a collective page was deleted but shared as view-only, guests could still access the deleted pages from the trashbin, bypassing intended access restrictions. This issue was addressed and patched in Nextcloud version 4.3.0.
Potential Impact
The vulnerability allows unauthorized read access to deleted pages in the trashbin by guests with view-only access to a shared collective. The impact is limited to confidentiality (low data exposure) without affecting integrity or availability. There are no known active exploits in the wild.
Mitigation Recommendations
Upgrade Nextcloud to version 4.3.0 or later, where this vulnerability has been patched. Patch status is confirmed by the vendor advisory indicating the fix in version 4.3.0. No additional mitigation is required once updated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-08T20:44:38.964Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a1dbba3e29bf47b501c57b0
Added to database: 6/1/2026, 5:04:35 PM
Last enriched: 6/1/2026, 5:20:44 PM
Last updated: 6/2/2026, 6:14:45 AM
Views: 8
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.