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CVE-2026-45154

Nextcloud: Improper Access Control in Collectives

Published: Jun 1, 2026Updated: Jun 1, 2026 Sources: CVE List NVD
NVD MITRE
2.6CVSS
LOW

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.

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:NAC:HPR:LUI:RS:UC:LI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:NAvailability
None

Weaknesses

CWE-284

Affected Products

security-advisories
nextcloud

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8mpv-ggq8-hf3w
github.com
https://github.com/nextcloud/collectives/pull/2432
github.com
https://hackerone.com/reports/3521434
hackerone.com

Timeline

Published
Jun 1, 2026
Last Updated
Jun 1, 2026

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