CVE-2026-45278
Nextcloud: Open Redirect in user_oidc login flow via protocol-relative URL bypass
CVSS Score
3.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-601 |
| Vendor | nextcloud |
| Product | security-advisories |
| Published | Jun 1, 2026 |
| Last Updated | Jun 2, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None
Affected Versions
nextcloud / security-advisories
>= 6.1.0, < 8.2.2