Vulnerability 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 JSON-RPC handler bound the connection to the client-supplied sessid on the first frame, before the authentication gate. Binding inserts the connection into the global session hash and, on a key collision, drops the prior occupant of that slot — sending it a verto.punt, detaching its calls, and closing its socket. An unauthenticated network attacker who knows a target session UUID could therefore evict the legitimate client. This issue has been patched in version 1.11.1.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Freeswitch | Freeswitch | < 1.11.1 |
Related Weaknesses (CWE)
References
- https://github.com/signalwire/freeswitch/releases/tag/v1.11.1Release Notes
- https://github.com/signalwire/freeswitch/security/advisories/GHSA-9457-fxr9-x78mThird Party Advisory
FAQ
What is CVE-2026-49843?
CVE-2026-49843 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 ...
How severe is CVE-2026-49843?
CVE-2026-49843 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-49843?
Check the references section above for vendor advisories and patch information. Affected products include: Freeswitch Freeswitch.