PT-2026-45476 · Nextcloud · Security-Advisories

Brumbelow · Published 2026-06-01 · Updated 2026-06-01 · CVE-2026-45266

NVD

CVSS v3.1

3.5

Low

Base vector

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

Nextcloud is an open source content collaboration platform. Prior to versions 21.1.10, 22.0.11, and 23.0.3, a low-privileged user can force other user's microphones to be muted in calls when no High-performance Backend is installed. This issue has been patched in versions 21.1.10, 22.0.11, and 23.0.3.

Fix

Improper Access Control

Weakness Enumeration

CWE-284

Related Identifiers

CVE-2026-45266

Affected Products

Security-Advisories

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-45266 · Security Note
• https://github.com/nextcloud/spreed/pull/17577 · Note
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-x75r-65hm-cw35 · Note
• https://hackerone.com/reports/3636758 · Note