Vulnerability · Published Jun 1, 2026 · Assigned by GitHub_M
CVE-2026-45266Nextcloud: Unauthorized force-mute from missing permission check when using internal signaling
Low 3.5
In plain English
A low-severity improper access control in security-advisories from nextcloud. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities).
Severity (CVSS 3.1)3.5Low
Exploit odds (30 days)0.2%top 89.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| nextcloud | security-advisories | < 21.1.10< 22.0.11< 23.0.3 |
Weakness: CWE-284 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-x75r-65hm-cw35 x_refsource_CONFIRM
- https://github.com/nextcloud/spreed/pull/17577 x_refsource_MISC
- https://hackerone.com/reports/3636758 x_refsource_MISC