CVE-2026-45278CWE-601

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

Low · published June 1, 2026

CVSS v3.1
3.3
EPSS
0%
Percentile
24.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
3.3 · LOW
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00322 · 24.0th percentile
Weakness
CWE-601 · URL Redirection to Untrusted Site ('Open Redirect')
Published
2026-06-01T16:51Z
EPSS history
Timeline
  • 01 JUN 16:51Z
    Nextcloud: Open Redirect in user_oidc login flow via protocol-relative URL bypass
    cvelistv5