Open Redirect in Nextcloud Security-advisories

CVE-2026-45278

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 OI…

Vulnerability class: Open Redirect

EPSS: 0.000 (6.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-45278?
CVE-2026-45278 is a low-severity vulnerability in Nextcloud Security-advisories, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 3.3/10. Published 2026-06-01.
How severe is CVE-2026-45278?
Low severity. CVSS v3 base score is 3.3 out of 10.