CVE-2026-49848FreeSWITCH: Pre-authentication `userVariables` injection in `mod_verto`

Description

FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a software implementation that runs on any commodity hardware. Prior to version 1.11.1, mod_verto's check_auth userauth branch wrote request-supplied userVariables into the connection state before comparing the supplied password. The writes are append-only and the connection is not closed on a failed compare, so values declared on bad-password attempts persisted on the same WebSocket and carried into a subsequent successful login on that connection. This issue has been patched in version 1.11.1.

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

References and patches

• https://github.com/signalwire/freeswitch/security/advisories/GHSA-j38x-xm7f-9p2f Third Party Advisory
• https://github.com/signalwire/freeswitch/releases/tag/v1.11.1 Release Notes