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Nextcloud: Cross-room signaling injection enabling unauthorized force-mute

🗓️ 30 Mar 2026 02:34:47Reported by brumbelowType 
hackerone
 hackerone
🔗 hackerone.com

Cross-room signaling injection in Nextcloud Talk allows low-privileged users to force-mute.

Related
ReporterTitlePublishedViews
Family
cnnvd
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NextCloud Access Control Vulnerability
1 Jun 202600:00
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cve
CVE
CVE-2026-45266
1 Jun 202616:39
–cve
cvelist
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CVE-2026-45266 Nextcloud: Unauthorized force-mute from missing permission check when using internal signaling
1 Jun 202616:39
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euvd
EUVD
EUVD-2026-33678
1 Jun 202616:39
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nextcloud
Nextcloud
Unauthorized force-mute from missing permission check when using internal signaling
12 May 202608:15
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mend
Mend
CVE-2026-45266
1 Jun 202616:39
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nvd
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CVE-2026-45266
1 Jun 202617:17
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ptsecurity
Positive Technologies
PT-2026-45476
1 Jun 202600:00
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rapid7
Rapid7 Vulnerability Database (full)
CVE-2026-45266: Improper Access Control
1 Jun 202600:00
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redhatcve
RedhatCVE
CVE-2026-45266
5 Jun 202619:47
–redhatcve
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21 Oct 2026 18:56Current
6Medium risk
Vulners AI Score6
CVSS 3.13.5
EPSS0.00353
SSVC
0