CVE-2026-54632 SIPSorcery: Malformed UDP packet on the RTP/ICE socket can remotely terminate a media session (DoS)
Remote attackers can terminate active media sessions by sending malformed UDP packets to the RTP/ICE socket in the SIPSorcery library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-54632?
CVE-2026-54632 is a high-severity denial of service vulnerability in sipsorcery-org sipsorcery, published on 14 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
SIPSorcery is a WebRTC, SIP, and VoIP library for C# and .NET. Prior to 10.0.9, RTPChannel.OnRTPPacketReceived and the STUNAttribute.ParseMessageAttributes, STUNXORAddressAttribute, and STUNAddressAttribute parsing path index untrusted bytes without sufficient length checks, while UdpReceiver.EndReceiveFrom closes the channel when those operations raise a non-socket exception. A remote party can send a single short RTP packet or malformed zero-to-seven-byte STUN address attribute to the shared RTP/ICE socket, including during ICE connectivity checks before DTLS or STUN MESSAGE-INTEGRITY verification, and terminate the active RTP or WebRTC media session. The attacker must reach or learn the advertised ephemeral RTP/ICE port, but no authentication or user interaction is required, and the impact is limited to availability. This issue is fixed in version 10.0.9.
Which versions are affected by CVE-2026-54632?
2 open source packages ship an affected version, including SIPSorcery.
| Package | Affected | Fixed in |
|---|---|---|
SIPSorcery NuGet | All versions | 10.0.9 |
SIPSorcery NuGet | All versions | 10.0.9 |
How do I fix CVE-2026-54632?
Upgrade SIPSorcery to 10.0.9 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-54632 being exploited?
There is no known exploitation of CVE-2026-54632 in the wild and no public exploit code.
Sources
Also known as GHSA-28gm-jrmw-xx93.