CVE-2026-45278

6.1 mediumEPSS 0.2%

Medium (6.1) in nextcloud user oidc. EPSS 0.2% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

6.1 medium

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

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 14% of CVEs (scores of 2026-10-31)
CWE: CWE-601
Published: 2026-06-01
Modified: 2026-07-20
Record from: the NVD, synced 2026-10-19

Affected

nextcloud:user_oidc

References

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

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