CVE-2026-45284

Nextcloud: Wrong condition in the User OIDC app's LdapService allowed deleted LDAP users to authenticate

CVSS 4.6 MEDIUMEPSS 0.2%CWE-284

Vexday Risk Score

13Baixo

Decisão SSVC (CISA)

Track

Sem sinal de exploração → monitorar

CVSS 4.6EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

01 jun 2026Publicada no NVD

Recomendação: Monitorar — sem sinal de exploração no momento.

Nextcloud is an open source content collaboration platform. From version 1.3.6 to before version 8.4.0, an improper check allowed users that where provided by LDAP to still authenticate towards user OIDC after they where deleted. This issue has been patched in version 8.4.0.

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

Produtos afetados

nextcloud · security-advisories

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Referências

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-79xf-ffj8-96fm https://github.com/nextcloud/user_oidc/pull/1340 https://hackerone.com/reports/3554696