CVE-2026-49848: Freeswitch

Medium severity, CVSS 4.3. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Freeswitch Freeswitch: before 1.11.1 (fixed in 1.11.1)

Published 2026-06-09. Last modified 2026-07-23.