CVE-2026-9585
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedAn unauthenticated reflected cross-site scripting (XSS) vulnerability exists in Sangoma Switchvox SMB Edition version 8.3 (104997). The application fails to properly sanitize the portal parameter supplied to the invalid_browser and invalid_browser_login handlers. User-supplied data is reflected into JavaScript generated by the application, allowing attacker-controlled script execution within a victim's browser.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceAn unauthenticated reflected XSS vulnerability exists in Sangoma Switchvox SMB Edition v8.3 (104997). The portal parameter in the invalid_browser and invalid_browser_login handlers fails to sanitize user input, which gets reflected directly into JavaScript context, allowing arbitrary script execution.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- Authentication
- X
- User interaction
- P
- Scope
- X
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Confirm Sangoma Switchvox SMB Edition installationIdentify if the target system is running Sangoma Switchvox SMB Edition. Check the web interface for Switchvox branding, or inspect running processes/services on the system for switchvox-related processes. The application typically runs on standard web ports (443, 8443).Affected if The system is running Sangoma Switchvox SMB Edition
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Verify the installed versionLocate the version information by checking the Switchvox admin interface login page for version/build numbers, or inspecting system files such as /opt/switchvox/etc/version or similar configuration files. Confirm the exact version is 8.3 with build 104997.Affected if Version is exactly 8.3 (build 104997)
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Determine if the web interface is accessibleTest connectivity to the Switchvox web interface ports. Since this is an unauthenticated reflected XSS, the vulnerable handlers must be reachable without authentication. Confirm the web application is network-accessible.Affected if Web interface is accessible without authentication
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Inspect the vulnerable parameter handlersReview web server logs or application logs for requests to the invalid_browser or invalid_browser_login endpoints. Check if the application processes the 'portal' parameter and reflects it into the response without sanitization by examining the application's request handling code or proxy configuration.Affected if The application processes the portal parameter in invalid_browser or invalid_browser_login handlers without output encoding
A system is affected if it runs Sangoma Switchvox SMB Edition version 8.3 build 104997 with an accessible web interface where the portal parameter in invalid_browser or invalid_browser_login handlers reflects user input without sanitization into JavaScript context.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataImplement proper input validation and output encoding for the portal parameter in the vulnerable handlers to prevent script injection.
- Consultation2.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-9585 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-9585 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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