What is CVE-2026-45153?

CVE-2026-45153 is a medium-severity vulnerability in Nextcloud Security-advisories, classified under Improper Authentication. CVSS score: 4.6/10. Published 2026-06-01.

How severe is CVE-2026-45153?

Medium severity. CVSS v3 base score is 4.6 out of 10.

Auth bypass in Nextcloud Security-advisories

CVE-2026-45153

Nextcloud is an open source content collaboration platform. From version 33.0.0 to before version 33.1.0, after unlocking a locked Android phone the back-button could be used to bypass the Nextcloud Files app PIN. This issue has been patch…

Vulnerability class: Broken Authentication

EPSS: 0.000 (2.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:P/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N.

Affected products

Nextcloud Security-advisories — versions >= 33.0.0, < 33.1.0

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-45153?: CVE-2026-45153 is a medium-severity vulnerability in Nextcloud Security-advisories, classified under Improper Authentication. CVSS score: 4.6/10. Published 2026-06-01.
How severe is CVE-2026-45153?: Medium severity. CVSS v3 base score is 4.6 out of 10.