CVE-2026-45690

Published Jun 1, 2026

Last updated a day ago

Overview

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, an authentication bypass vulnerability allowed attackers with knowledge of a user's password to circumvent two-factor authentication (2FA) protections. When a user initiated login with valid credentials on a 2FA-enabled account, the system created a temporary session token before enforcing the second factor challenge. This token could be extracted and replayed via HTTP Basic Authentication to gain unauthorized access to authenticated endpoints. 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
Source
security-advisories@github.com
NVD status
Analyzed
Products
nextcloud_server

Risk scores

CVSS 3.1

Type
Secondary
Base score
5.9
Impact score
4.2
Exploitability score
1.6
Vector string
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N
Severity
MEDIUM

Weaknesses

security-advisories@github.com
CWE-287

Social media

Hype score
Not currently trending

Configurations