Resource exhaustion in freeswitch - CVE-2026-119292
Published: November 9, 2026
Vulnerability identifier: #VU162795
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-119292
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an unauthenticated remote attacker to cause one-way audio loss in FreeSWITCH calls, making conversation unusable while signaling remains established.
The vulnerability exists due to delayed source validation in FreeSWITCH RTP/SRTP handling, allowing packets from unrecognized sources to consume processing resources after the media peer is learned. An unauthenticated remote attacker can flood a known, UDP-reachable active media port from another source without an SRTP key, starving legitimate incoming media on calls that relay or echo it.
Affected software
freeswitch
How to mitigate CVE-2026-119292
Install security update from vendor's website.
freeswitch - update to 1.11.2