CVE-2026-45278

Nextcloud: Open Redirect in user_oidc login flow via protocol-relative URL bypass

CVSS 3.3 LOWEPSS 0.2%CWE-601

Vexday Risk Score

8Baixo

Decisão SSVC (CISA)

Track

Sem sinal de exploração → monitorar

CVSS 3.3EPSS 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 6.1.0 to before version 8.2.2, an attacker can craft links that would redirect users to another website, when the victim uses the attackers link to log in via user OIDC. This issue has been patched in version 8.2.2.

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

Produtos afetados

nextcloud · security-advisories

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Referências

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8wjr-5cg8-4w73 https://github.com/nextcloud/user_oidc/pull/1273 https://hackerone.com/reports/3464925