PT-2026-45534 · Nextcloud · Nextcloud Server+1

Dorra Jaouad + 1 · Publicado 2026-06-01 · Atualizado 2026-06-17 · CVE-2026-45690

Mitre

CVSS v3.1

5.9

Média

Vetor base

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

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

Correção

Improper Authentication

Enumeração de Fraquezas

CWE-287

Identificadores relacionados

CVE-2026-45690

Produtos afetados

Nextcloud Server

Security-Advisories

Referências · 5

• https://github.com/nextcloud/server/pull/59758 · Correção
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jgcj-v42r-9922 · Aviso do Fabricante
• https://hackerone.com/reports/3639301 · Nota
• https://nvd.nist.gov/vuln/detail/CVE-2026-45690 · Nota de Segurança
• https://twitter.com/threatcluster/status/2067291586774323342 · Publicação no Twitter