CVE-2026-45691

MEDIUM

Nextcloud Server 32.0.0-32.0.8 and 33.0.0-33.0.2 - Two-Factor Authentication Bypass via Pre-2FA Session Cookie Reuse

Title source: llm
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, a pre-2FA session cookie (created after successful password authentication but before TOTP completion) could be reused as a Bearer token to authenticate against DAV endpoints, granting read/write access and bypassing mandatory two-factor authentication. It is recommended that the Nextcloud Server is upgraded to 33.0.3 or 32.0.9. It is recommended that the Nextcloud Enterprise Server is upgraded to 33.0.3, 32.0.9, 31.0.14.5, 30.0.17.9 or 29.0.16.16

References (3)

Core 3

Scores

CVSS v3 5.9
EPSS 0.0029
EPSS Percentile 20.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N

Details

CWE
CWE-287
Status published
Products (2)
nextcloud/nextcloud_server 29.0.0 - 29.0.16.16
nextcloud/nextcloud_server 32.0.0 - 32.0.9
Published Jun 01, 2026
Tracked Since Jun 02, 2026