What is CVE-2026-45267?

CVE-2026-45267 is a medium-severity vulnerability in Nextcloud Security-advisories, classified under Information Disclosure. CVSS score: 6.5/10. Published 2026-06-01.

How severe is CVE-2026-45267?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Nextcloud Security-advisories

CVE-2026-45267

Nextcloud is an open source content collaboration platform. Prior to version 5.2.6, a missing permissions check allowed users to request reading form submissions of other users. This issue has been patched in version 5.2.6.

Vulnerability class: Information Disclosure

EPSS: 0.000 (6.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Nextcloud Security-advisories — versions < 5.2.6

Weakness classification (CWE)

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-2026-45267?: CVE-2026-45267 is a medium-severity vulnerability in Nextcloud Security-advisories, classified under Information Disclosure. CVSS score: 6.5/10. Published 2026-06-01.
How severe is CVE-2026-45267?: Medium severity. CVSS v3 base score is 6.5 out of 10.