CVE-2026-45157

MEDIUM

Nextcloud: Valid share tokens allow to access tempory upload files of share owner

Title source: cna
STIX 2.1

Description

Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, when a malicious user has access to a file share of a user, they could use this share token to also access the chunking upload directly and see temporary part files during on going uploads. It is recommended that the Nextcloud Server is upgraded to 32.0.9 or 33.0.3. It is recommended that the Nextcloud Enterprise Server is upgraded to 26.0.13.26, 27.1.11.25, 28.0.14.17, 29.0.16.16, 30.0.17.9, 31.0.14.5, 32.0.9 or 33.0.3

References (3)

Core 3
Core References
X_Refsource_Misc x_refsource_misc
https://github.com/nextcloud/server/pull/59780
X_Refsource_Misc x_refsource_misc
https://hackerone.com/reports/3483708

Scores

CVSS v3 6.3
EPSS 0.0023
EPSS Percentile 13.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N

Details

CWE
CWE-284
Status published
Products (2)
nextcloud/security-advisories >= 32.0.0, < 32.0.9
nextcloud/security-advisories >= 33.0.0, < 33.0.3
Published Jun 01, 2026
Tracked Since Jun 01, 2026