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OpenAdvisories
Low · 3.3 CVE-2026-45278 EUVD-2026-33704

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

Published Jun 1, 2026 · Updated Jun 2, 2026 · Assigned by GitHub_M

Description

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.

Affected products

VendorProductAffectedFixed
nextcloud security-advisories >= 6.1.0, < 8.2.2 —

Advisories 1

References