CVE-2026-49848: CWE-287: Improper Authentication in signalwire freeswitch
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.
AI Analysis
Technical Summary
CVE-2026-49848 describes an improper authentication vulnerability (CWE-287) in FreeSWITCH's mod_verto module before version 1.11.1. The vulnerability occurs because the check_auth userauth branch writes request-supplied userVariables into the connection state before verifying the supplied password. Since these writes are append-only and the connection is not closed on a failed password comparison, the userVariables from failed login attempts persist and carry over into subsequent successful logins on the same WebSocket connection. This could lead to unintended authentication state persistence. The issue is fixed in FreeSWITCH version 1.11.1.
Potential Impact
The vulnerability does not allow direct compromise of confidentiality or availability but can lead to improper authentication state persistence, potentially causing incorrect user context or privilege assumptions during sessions. The CVSS score of 4.3 reflects a medium severity with low complexity and no user interaction required. There are no known exploits in the wild.
Mitigation Recommendations
A fix is available in FreeSWITCH version 1.11.1. Users should upgrade to version 1.11.1 or later to remediate this vulnerability. No additional vendor advisories or temporary mitigations are provided.
CVE-2026-49848: CWE-287: Improper Authentication in signalwire freeswitch
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.
CVSS v3.1
Score 4.3medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-49848 describes an improper authentication vulnerability (CWE-287) in FreeSWITCH's mod_verto module before version 1.11.1. The vulnerability occurs because the check_auth userauth branch writes request-supplied userVariables into the connection state before verifying the supplied password. Since these writes are append-only and the connection is not closed on a failed password comparison, the userVariables from failed login attempts persist and carry over into subsequent successful logins on the same WebSocket connection. This could lead to unintended authentication state persistence. The issue is fixed in FreeSWITCH version 1.11.1.
Potential Impact
The vulnerability does not allow direct compromise of confidentiality or availability but can lead to improper authentication state persistence, potentially causing incorrect user context or privilege assumptions during sessions. The CVSS score of 4.3 reflects a medium severity with low complexity and no user interaction required. There are no known exploits in the wild.
Mitigation Recommendations
A fix is available in FreeSWITCH version 1.11.1. Users should upgrade to version 1.11.1 or later to remediate this vulnerability. No additional vendor advisories or temporary mitigations are provided.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-01T22:03:19.640Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a283e9b8dd33fbd8553f4a5
Added to database: 6/9/2026, 4:26:03 PM
Last enriched: 6/9/2026, 4:41:38 PM
Last updated: 6/10/2026, 5:06:26 AM
Views: 7
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