Exposure of Private Information ('Privacy Violation') in Nextcloud Mail - CVE-2026-61545
Published: August 10, 2026
Vulnerability identifier: #VU141393
CSH Severity: Medium
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-61545
CWE-ID: CWE-359
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability exists due to exposure of private personal information to an unauthorized actor. A remote user can bypass an administrator-configured user-enumeration restriction and gain unauthorized access to sensitive information on the system.
Affected software
Nextcloud Mail
How to mitigate CVE-2026-61545
Install updates from vendor's website.
Nextcloud Mail - addressed in versions 3.7.25, 5.5.16, 5.6.20, 5.7.13