High severityNVD Advisory· Published Jul 17, 2026· Updated Jul 17, 2026

CVE-2026-9588

Description

A stored cross-site scripting (XSS) vulnerability exists in Sangoma Switchvox SMB Edition 8.3 (104997) within the voicemail notification template functionality. The submit_modify_voicemail_template endpoint fails to properly sanitize HTML content supplied by authenticated users, allowing malicious JavaScript supplied through the template_text parameter to be stored server-side and subsequently rendered to other users.

Affected products

Freepbx/Switchvox SMB Editionllm-create
Range: = 8.3 (104997)
Freepbx/Switchvoxllm-create
Range: = 8.3 (104997)

Patches

Vulnerability mechanics

References

labs.sra.io/posts/switchvox/nvd
sangomakb.atlassian.net/wiki/spaces/Switchvox/pages/1802371073/Switchvox+-+Release+Notes+Version+8.4.0.2+July+14+2026nvd

News mentions

⚡ Weekly Recap: Chrome 0-Day, Router Hijacks, Coder Supply Chain Attack and More
The Hacker News · Sep 7, 2026

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