Nextcloud: Improper Access Control in Collectives

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-45154
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-01 17:17:09 UTC
Updated2026-07-22 07:10:00 UTC
DescriptionNextcloud 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.

Risk And Classification

Primary CVSS: v3.1 2.6 LOW from [email protected]

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

EPSS: 0.001890000 probability, percentile 0.088180000 (date 2026-07-22)

Problem Types: CWE-284 | CWE-284 CWE-284: Improper Access Control

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary2.6LOWCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N
3.1CNADECLARED2.6LOWCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Nextcloud Security-advisories affected >= 2.6.0, < 4.3.0 Not specified

References

ReferenceSourceLinkTags
github.com/nextcloud/security-advisories/security/advisories/GHSA-8mpv-g... [email protected] github.com
github.com/nextcloud/collectives/pull/2432 [email protected] github.com
hackerone.com/reports/3521434 [email protected] hackerone.com
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